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Keywords:

  • Citrus australasica;
  • Rutaceae;
  • finger lime;
  • peel oil;
  • terpenyl ester;
  • GC–MS

Abstract

The volatile constituents of the peel solvent extract of the Australian finger lime Citrus australasica were analysed by GC–MS. Besides limonene, isomenthone was a major component, which is rare in Citrus species. Six new terpenyl esters were also identified and confirmed by chemical synthesis: citronellyl 2-methylbutanoate; 1,8(10)-p-menthadien-9-yl propanoate; 1,8(10)-p-menthadien-9-yl 2-methylbutanoate; 1,8(10)-p-menthadien-9-yl 3-methylbutanoate; 1-p-menthen-9-yl 2-methylbutanoate; and 1-p-menthen-9-yl 3-methylbutanoate. To the best of our knowledge, the last four compounds have never before been identified in a natural product extract. Copyright © 2009 John Wiley & Sons, Ltd.