Volatile constituents of ethanol extracts of Hierochloe odorata L. var. Pubescens kryl.



The volatile constituents obtained from ethanol extracts of the root and the aerial parts of Hierochloe odorata L. var. pubescens Kryl. growing in the east of China were examined by a combination of GC, GC-MS and HPLC techniques. A total of 169 volatile compounds were identified. This volatile oil was rich in coumarin, which accounted for 10.3 % of the root oil and 24.9% of the aerial part oil. Quantitative analysis by HPLC showed that ethanol extract of the roots to contain 3.57% (m/m) of coumarin and that of the aerial parts 3.72% (m/m).