Essential oil components in the seed masses of Amomum xanthioides and its related species from Southeast Asia and China

In this study, 51 crude drug samples of AS in Japanese markets were classified into four groups or species based on their ITS sequences. Approximately 67% of samples were derived fromA. villosum var.xanthioides orA. xanthioides,A. villosum var.villosum andA. longiligulare prescribed in Japanese Pharmacopoeia, and the rest were mixed withA. uliginosum andA. microcarpum. Subsequently, the essential oil compositions ofAmomum taxa specimens and AS samples were determined by GC –MS to characterize each group or species. Group 1(A. xanthioides) samples were characterized by containing higher amount of camphor(6) than bornyl acetate(9), and a specific germacreneD-4-ol; group 2(ChineseA. villosum var.villosum and var.xanthioides) by containing higher amount of9 than6, a specific isobornyl acetate; group 3(LaotianA. villosum var.villosum andA. longiligulare) by containing higher amount of6 than9, and a characteristic neointermedeol, except forA. longiligulare specimen from Hainan, China; group 4(A. uliginosum) by containing equivalent amount of6 and9, and the specific (E,E)-farnesyl acetate and (E,E)-farnesol.A. microcarpum samples were discriminated from the above groups by absence of6 and9, and with higher amount of (E)-nerolidol. There was a good correlation between genetic classification and chemical discrimination.
Source: Journal of Natural Medicines - Category: Drugs & Pharmacology Source Type: research