Chemistry – An Asian Journal

Cover image for Vol. 6 Issue 1

January 3, 2011

Volume 6, Issue 1

Pages 1–235

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    4. Editorials
    5. Graphical Abstract
    6. News
    7. Society Spotlight
    8. Focus Reviews
    9. Communications
    10. Full Papers
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    1. Cover Picture: Self-Assembled Gels for Biomedical Applications (Chem. Asian J. 1/2011) (page 1)

      Warren Ty Truong, Yingying Su, Dr. Joris T. Meijer, Dr. Pall Thordarson and Prof. Filip Braet

      Article first published online: 27 DEC 2010 | DOI: 10.1002/asia.201090045

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      Biomedical applications of self-assembled or molecular gels are discussed by W. T. Truong et al. in their Focus Review on page 30 ff. Their use in three-dimensional cell-culture studies, drug delivery, and tissue engineering is described, and their reversibility, well-defined chemical nature, and relative ease of synthesis make self-assembled gels a particularly interesting target for conjugating or mixing with drugs or bioactive molecules. Consequently, self-assembled gels constitute a new class of “smart” biomaterials that hold great promise for curing life-threatening conditions like neural injuries, diabetes, cancer, and infections.

  2. Inside Cover

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    4. Editorials
    5. Graphical Abstract
    6. News
    7. Society Spotlight
    8. Focus Reviews
    9. Communications
    10. Full Papers
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    1. Inside Cover: Ring Like Octadecanuclear Mixed-valence Manganese Cluster with a Spin Ground State of 20 (Chem. Asian J. 1/2011) (page 2)

      Dr. Cai-Ming Liu, Prof. De-Qing Zhang and Prof. Dao-Ben Zhu

      Article first published online: 27 DEC 2010 | DOI: 10.1002/asia.201090048

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      The large spin ground states required for nanomolecule magnets are difficult to obtain in ring-like manganese cluster systems. In their Communication on page 74 ff., C.-M. Liu et al. report the synthesis of a ring-like manganese cluster [MnII8MnIII6MnIV4], whose octadecanuclear core was composed of eighteen face-shared-defect {Mn3O4} cuboidal units. This complex has the largest spin ground state for such cluster complexes so far.

  3. Editorials

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    4. Editorials
    5. Graphical Abstract
    6. News
    7. Society Spotlight
    8. Focus Reviews
    9. Communications
    10. Full Papers
    11. Preview
    1. You have free access to this content
      Societies in the Spotlight (pages 4–7)

      Brian Johnson

      Article first published online: 22 DEC 2010 | DOI: 10.1002/asia.201000864

    2. International Year of Chemistry

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  4. Graphical Abstract

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    4. Editorials
    5. Graphical Abstract
    6. News
    7. Society Spotlight
    8. Focus Reviews
    9. Communications
    10. Full Papers
    11. Preview
    1. Graphical Abstract: Chem. Asian J. 1/2011 (pages 12–19)

      Article first published online: 27 DEC 2010 | DOI: 10.1002/asia.201090046

  5. News

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    4. Editorials
    5. Graphical Abstract
    6. News
    7. Society Spotlight
    8. Focus Reviews
    9. Communications
    10. Full Papers
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    1. Spotlights on our sister journals: Chem. Asian J. 1/2011 (pages 20–22)

      Article first published online: 27 DEC 2010 | DOI: 10.1002/asia.201090047

  6. Society Spotlight

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    4. Editorials
    5. Graphical Abstract
    6. News
    7. Society Spotlight
    8. Focus Reviews
    9. Communications
    10. Full Papers
    11. Preview
  7. Focus Reviews

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    4. Editorials
    5. Graphical Abstract
    6. News
    7. Society Spotlight
    8. Focus Reviews
    9. Communications
    10. Full Papers
    11. Preview
    1. Biomaterials

      Self-Assembled Gels for Biomedical Applications (pages 30–42)

      Warren Ty Truong, Yingying Su, Dr. Joris T. Meijer, Dr. Pall Thordarson and Prof. Filip Braet

      Article first published online: 12 NOV 2010 | DOI: 10.1002/asia.201000592

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      Self-assembled medicine! Emerging medical applications of self-assembled gels (see picture) based on interactions between these materials with cells and tissues, such as drug delivery, 3D cell cultures, and tissue engineering, are discussed.

    2. Electrospinning

      Melt Electrospinning (pages 44–56)

      Prof. Dietmar W. Hutmacher and Dr. Paul D. Dalton

      Article first published online: 15 NOV 2010 | DOI: 10.1002/asia.201000436

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      New kid on the block: Melt electrospinning is comparatively under-investigated compared to solution electrospinning but provides opportunities in numerous areas where solvent accumulation or toxicity are a concern. This Focus Review provides an historical perspective and covers all published articles on melt electrospinning. Additionally, we describe two uses for melt-electrospun fibers—textiles and scaffolds for tissue engineering (TE) applications—and put forth our opinions on the future in these areas.

    3. Fluorescent Probes

      Two-Photon Fluorescent Probes for Metal Ions (pages 58–69)

      Prof. Dr. Hwan Myung Kim and Prof. Dr. Bong Rae Cho

      Article first published online: 20 OCT 2010 | DOI: 10.1002/asia.201000542

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      In search for metals: In this Focus Review, recent model studies and selected examples are described of two-photon probes that can detect intracellular free metal ions in live cells and tissues to provide a guideline for the design of useful two-photon probes for various in vivo imaging applications.

  8. Communications

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    4. Editorials
    5. Graphical Abstract
    6. News
    7. Society Spotlight
    8. Focus Reviews
    9. Communications
    10. Full Papers
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    1. DNA Hybridization

      Back-Scattering Interferometry: A Versatile Platform for the Study of Free-Solution versus Surface-Immobilized Hybridization (pages 70–73)

      Esther N. Pesciotta, Prof. Darryl J. Bornhop and Prof. Robert A. Flowers II

      Article first published online: 16 NOV 2010 | DOI: 10.1002/asia.201000614

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      The first direct comparison of surface immobilization and free-solution oligonucleotide hybridization using back-scattering interferometry (BSI) showed that surface immobilization perturbs hybridization by as much as 50 %. BSI can distinguish between a perfect complement and a two-base-pair mismatch with an internal mismatch significantly destabilizing the duplex.

    2. Manganese Clusters

      Ring Like Octadecanuclear Mixed-valence Manganese Cluster with a Spin Ground State of 20 (pages 74–77)

      Dr. Cai-Ming Liu, Prof. De-Qing Zhang and Prof. Dao-Ben Zhu

      Article first published online: 20 OCT 2010 | DOI: 10.1002/asia.201000511

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      Big spin! In the presence of 2-aminopropane-1,2-diol, the reaction of 1,1,1-tris-(hydroxylmethyl)propane and [Mn(acac)2] in MeCN yielded a novel ring-like octadecanuclear mixed-valence manganese cluster complex, which exhibits an overall ferromagnetic property and possesses a large spin ground state of 20.

    3. Asymmetric Cyclopropanation

      A Chiral Bis(oxazoline) Ligand Embedded into Polysiloxane Gel: Application to a Reusable Copper Catalyst for Asymmetric Cyclopropanation (pages 78–82)

      Dr. Yukihiro Motoyama, Dr. Takashi Nishikata and Prof. Dr. Hideo Nagashima

      Article first published online: 30 NOV 2010 | DOI: 10.1002/asia.201000527

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      “Box”ed in: A novel polysiloxane gel encapsulated CuII/bis(oxazoline) (CuII/Box) species was synthesized and used as a recyclable catalyst in the asymmetric cyclopropanation of alkenes with L-menthyl diazoacetate.

  9. Full Papers

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    4. Editorials
    5. Graphical Abstract
    6. News
    7. Society Spotlight
    8. Focus Reviews
    9. Communications
    10. Full Papers
    11. Preview
    1. Peptides

      The Design of α/β-Peptides: Study on Three-Residue Turn Motifs and the Influence of Achiral Glycine on Helix and Turn (pages 84–97)

      Dr. Gangavaram V. M. Sharma, Nagula Chandramouli, Shaik Jeelani Basha, Dr. Pendem Nagendar, Dr. Kallaganti V. S. Ramakrishna and Dr. Akella V. S. Sarma

      Article first published online: 4 OCT 2010 | DOI: 10.1002/asia.201000438

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      A turn for the better: α/β-Peptides with novel turns (12/7-, 14/7-, and 15/7-) at the C terminus were prepared. Similarly, the design with glycine gave an opportunity to study the influence of achiral α-residues on helix formation and stability. This study also resulted in a new 13-membered ‘turn’ in the forward direction, which resembles the α-turn (see picture).

    2. Nanomaterials

      Construction of Heterojunction Nanowires from Polythiophene/Polypyrrole for Applications as Efficient Switches (pages 98–102)

      Yanbing Guo, Prof. Yuliang Li, Dr. Yongjun Li, Dr. Huibiao Liu, Guoxing Li, Yingjie Zhao and Haowei Lin

      Article first published online: 16 NOV 2010 | DOI: 10.1002/asia.201000400

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      A smart thing! PTh–PPY heterojunction nanowires exhibit smart responses to electrochemical redox potentials. At the oxidation state, PTh–PPY nanowires acts as resistors, whilst at the reduction state, they acts as diodes. Furthermore, the electrical transport mode can be reversibly changed by alternately exposing the nanowires to negative and positive potentials.

    3. Nanoparticles

      Synthesis of Ordered Porous Graphitic-C3N4 and Regularly Arranged Ta3N5 Nanoparticles by Using Self-Assembled Silica Nanospheres as a Primary Template (pages 103–109)

      Yuki Fukasawa, Dr. Kazuhiro Takanabe, Dr. Atsushi Shimojima, Dr. Markus Antonietti, Prof. Kazunari Domen and Prof. Tatsuya Okubo

      Article first published online: 24 NOV 2010 | DOI: 10.1002/asia.201000523

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      Following an order: Silica nanospheres were used as a template to form ordered porous graphitic carbon nitride (g-C3N4), which were used in the synthesis of crystalline Ta3N5 nanoparticles. These showed improved photocatalytic activity for H2 evolution under visible-light irradiation.

    4. Energy Transfer

      Highly Efficient and Directional Homo- and Heterodimeric Energy Transfer Materials Based on Fluorescently Derivatized α,γ-Cyclic Octapeptides (pages 110–121)

      Roberto J. Brea, María Jesús Pérez-Alvite, Michele Panciera, Prof. Dr. Manuel Mosquera, Prof. Dr. Luis Castedo and Prof. Dr. Juan R. Granja

      Article first published online: 26 OCT 2010 | DOI: 10.1002/asia.201000545

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      Pep talk on peptides: Cyclic octapeptides composed of alternating α-amino acids and cis-3-aminocycloalkanecarboxylic acids self-assemble through β-sheet-like hydrogen bonding (see figure). A multicomponent equilibrium network based on fluorescently derivatized α,γ-cyclic octapeptides has been successfully used to form light-harvesting/light-converting ensembles with a distinctive organization of donor and acceptor units.

    5. Microarrays

      Zinc(II)-Dipicolylamine-Functionalized Polydiacetylene–Liposome Microarray: A Selective and Sensitive Sensing Platform for Pyrophosphate Ions (pages 122–127)

      Kyung Mi Kim, Dong Ju Oh and Prof. Kyo Han Ahn

      Article first published online: 9 DEC 2010 | DOI: 10.1002/asia.201000621

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      Microchip ‘N Dale: A microarray-chip system based on a poly(diacetylene) liposome functionalized with a zinc(II)-dipicolylamine ligand detects pyrophosphate ions with unparalleled sensitivity and selectivity. These chips show advantages over solution-based assays that use the same liposomes.

    6. Hydrogels

      Thermoresponsive Hydrogel Scaffolds with Tailored Hydrophilic Pores (pages 128–136)

      Jeong Ae Yoon, Dr. Sidi A. Bencherif, Dr. Burak Aksak, Eun Kyung Kim, Prof. Tomasz Kowalewski, Prof. Jung Kwon Oh and Prof. Krzysztof Matyjaszewski

      Article first published online: 15 DEC 2010 | DOI: 10.1002/asia.201000514

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      With arms wide open: Thermoresponsive hydrogels based on poly(2-(2-methoxyethoxy)ethyl methacrylate) were synthesized by ATRP, using core-degradable, hydrophilic-arm-containing star macroinitiators. The subsequent degradation of disulfide crosslinks generated hydrogels with hydrophilic porous domains. This unique strategy enabled the preparation of highly swelling and rapidly deswelling hydrogels.

    7. Heteropoly Acids

      New Insights into Keggin-Type 12-Tungstophosphoric Acid from 31P MAS NMR Analysis of Absorbed Trimethylphosphine Oxide and DFT Calculations (pages 137–148)

      Dr. Shing-Jong Huang, Chih-Yi Yang, Dr. Anmin Zheng, Ningdong Feng, Dr. Ningya Yu, Pei-Hao Wu, Prof. Dr. Yu-Chi Chang, Prof. Dr. Ying-Chih Lin, Prof. Dr. Feng Deng and Prof. Dr. Shang-Bin Liu

      Article first published online: 22 DEC 2010 | DOI: 10.1002/asia.201000572

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      Truly superacidic! The acid and transport properties of the Keggin-type H3PW12O40 (HPW) heteropoly acid have been studied by solid-state 31P magic-angle spinning NMR spectroscopy of adsorbed trimethylphosphine oxide (TMPO) in conjunction with DFT calculations. Detailed features of the protonic acid sites and the spatial proximity of the TMPO/HPW host–guest complexes were obtained at the molecular level.

    8. Foldamers

      Folding of a Donor-Containing Ionene by Intercalation with an Acceptor (pages 149–156)

      Swati De and Prof. S. Ramakrishnan

      Article first published online: 4 NOV 2010 | DOI: 10.1002/asia.201000528

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      Know when to fold ′em: When coerced to collapse in a polar solvent in the presence of an electron-deficient amphiphilic folding agent, suitably modified ionenes with a symmetrically positioned electron-rich 1,5-dialkoxylnaphthalene (DAN) unit appear to form an accordion-type folded structure wherein the units are arranged in an alternating fashion (see picture). D=Donor; A=Acceptor.

    9. Nonlinear Spectroscopy

      Synthesis, Two-Photon Absorption and Optical Limiting Properties of Multi-branched Styryl Derivatives Based on 1,3,5-Triazine (pages 157–165)

      Yihua Jiang, Yaochuan Wang, Bing Wang, Jiabao Yang, Nannan He, Shixiong Qian and Jianli Hua

      Article first published online: 22 OCT 2010 | DOI: 10.1002/asia.201000536

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      Limiting the power! A series of new octupolar triazine molecules () containing multibranched styryl derivative moieties have been designed and synthesized. The two-photon absorption cross section values increase with increasing electron-donating strength of the end group, extending the conjugation length of the system, introducing electron-withdrawing perfluoroalkyl as side groups to the end donor, and making charge transfer from the center of the triphenylamine to the triazine ends possible.

    10. Indole Alkaloids

      Seven New Monoterpenoid Indole Alkaloids from Gelsemium elegans (pages 166–173)

      Yousuke Yamada, Dr. Mariko Kitajima, Dr. Noriyuki Kogure, Dr. Sumphan Wongseripipatana and Prof. Dr. Hiromitsu Takayama

      Article first published online: 19 OCT 2010 | DOI: 10.1002/asia.201000538

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      Structurally complex alkaloids: Their structures of seven new indole alkaloids, isolated from the roots of G. elegans, were determined by spectroscopic analyses and chemical transformation. Koumine-type alkaloid possesses an unusual aminal moiety, whilst humantenine-related alkaloids and have novel β-amino-α,β-unsaturated ketone residues.

    11. Electron Transfer

      Photoinduced Electron Transfer in a Distyryl BODIPY–Fullerene Dyad (pages 174–179)

      Dr. Jian-Yong Liu, Dr. Mohamed E. El-Khouly, Prof. Shunichi Fukuzumi and Prof. Dennis K. ;P. Ng

      Article first published online: 19 OCT 2010 | DOI: 10.1002/asia.201000537

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      Charge separation: A novel distyryl BODIPY–fullerene dyad has been prepared (see figure) which, upon excitation at the distyryl BODIPY moiety, undergoes a facile photoinduced electron transfer to give a relatively long-lived charge-separated state.

    12. Total Synthesis

      Solid-phase Total Synthesis of (−)-Apratoxin A and Its Analogues and Their Biological Evaluation (pages 180–188)

      Prof. Dr. Takayuki Doi, Dr. Yoshitaka Numajiri, Prof. Dr. Takashi Takahashi, Dr. Motoki Takagi and Dr. Kazuo Shin-ya

      Article first published online: 15 NOV 2010 | DOI: 10.1002/asia.201000549

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      Solid Approach: Two routes for the solid-phase total synthesis of apratoxin A have been described. On the basis of this method, its analogues were synthesized and their biological activity has been evaluated.

    13. Heterocycles

      Regioselective Ring-Opening of Amino Acid-Derived Chiral Aziridines: an Easy Access to cis-2,5-Disubstituted Chiral Piperazines (pages 189–197)

      Krishnananda Samanta and Dr. Gautam Panda

      Article first published online: 12 NOV 2010 | DOI: 10.1002/asia.201000554

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      The pied piperazines: A four-step efficient synthetic strategy for cis-2,5-disubstituted chiral piperazines derived from amino acid-based aziridines is described. The key reaction steps are the highly regioselective BF3OEt2 mediated ring-opening of less-reactive N-Ts chiral aziridines by α-amino acid methyl ester hydrochlorides, followed by a Mitsunobu cyclization. This protocol has been used in an attempt to construct the piperazine core framework of natural product (+)-piperazinomycin.

    14. Fluorophores

      Gold(III) Complexes of Asymmetrically Aryl-Substituted 1,2-Dithiolene Ligands Featuring Potential-Controlled Spectroscopic Properties: An Insight into the Electronic Properties of bis(Pyren-1-yl-ethylene-1,2-dithiolato)Gold(III) (pages 198–208)

      Dr.  M. Carla Aragoni, Dr. Massimiliano Arca, Prof. Francesco A. Devillanova, Prof. Francesco Isaia, Prof. Dr. Vito Lippolis and Dr. Anna Pintus

      Article first published online: 22 DEC 2010 | DOI: 10.1002/asia.201000525

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      All that glitters: The structural, spectroscopic, and electrochemical properties of the 1,2-dithiolene complex [Au(Pyr,H-edt)2]x (x, Pyr,H-edt2−=pyren-1-yl-ethylene-1,2-dithiolato; x=0, 1, 2) are investigated and compared with those of different [Au(Ar,H-edt)2]x complexes [Ar=naphth-2-yl () and phenyl ()] on the basis of DFT calculations. Remarkably, features potential-controlled NIR absorption and visible-emitting properties, and the cis isomers of xx (x=0, 1) represent very promising materials for second-order nonlinear optical applications.

    15. Natural Products

      Total Synthesis of (−)-Salinosporamide A (pages 209–219)

      Yuji Kaiya, Jun-ichi Hasegawa, Dr. Takayuki Momose, Dr. Takaaki Sato and Prof. Noritaka Chida

      Article first published online: 5 NOV 2010 | DOI: 10.1002/asia.201000602

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      Rearrange your chemistry! The total synthesis of anticancer natural product salinosporamide A has been achieved through a unique skeletal rearrangement (see scheme). This reaction enabled the construction of the densely functionalized γ-lactam structure found in salinosporamide A through practical methodologies including an Overman rearrangement on a D-arabinose scaffold.

    16. Asymmetric Addition

      Enantioselective and Regioselective Organocatalytic Conjugate Addition of Malonates to Nitroenynes (pages 220–225)

      Xiao-Jiao Li, Fang-Zhi Peng, Xiang Li, Wen-Tao Wu, Zhong-Wen Sun, Ying-Mei Li, Shao-Xiong Zhang and Prof. Dr. Zhi-Hui Shao

      Article first published online: 12 NOV 2010 | DOI: 10.1002/asia.201000561

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      Go organic: The first catalytic asymmetric conjugate addition of malonates to nitroenynes catalyzed by cinchona alkaloid-based thiourea organocatalysts has been developed. The 1,4-addition adducts were obtained in moderate to good yields (up to 93 %) with good enantioselectivities (up to 99 % ee; see scheme).

    17. Nanostructures

      Synthesis and Supramolecular Self-Assembly of Coil-Rod-Coil Molecules: The Relationship between Self-Assembled Nanostructures and Molecular Structures (pages 226–233)

      Yulan Chen, Fan Zhang, Bo Zhu, Yang Han and Prof. Dr. Zhishan Bo

      Article first published online: 7 DEC 2010 | DOI: 10.1002/asia.201000567

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      Roll up, roll up: The self-assembly of coil-rod-coil molecules with different alkyl chains, central mesogenic groups, and chemical linkers, resulted in low-dimensional superstructures (nanotubes, nanofibers, submicron sized belts, etc.), and disclosed the key structural features of coil-rod-coil molecules for the formation of rolled-up nanotubes.

  10. Preview

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    4. Editorials
    5. Graphical Abstract
    6. News
    7. Society Spotlight
    8. Focus Reviews
    9. Communications
    10. Full Papers
    11. Preview
    1. You have free access to this content
      Preview: Chem. Asian J. 2/2011 (page 235)

      Article first published online: 27 DEC 2010 | DOI: 10.1002/asia.201090049

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