Some of the electronic structure of the sesquiterpene alcohols hydrocarbons as β-elemene (40), β-caryophyllene (41), germacrene B (64) in Quang Binh province have captured a ratio much higher than the rest. On the other hand, structures, such as caryophyleine-(I3) (50), eudesma-4 (14), 11-diene (51) is only present in the essential oil of the leaves Vietnam with significant content.
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