Chemical composition of the essential oil of Pogostemon auricularius (L.) Hassk. from Vietnam

Tran Huy Thai, Nguyen Quang Hung, Do Thi Minh, Phung Tuyet Hong


Pogostemon auricularius (L.) Hassk. (Lamiaceae) is an erect or procumbent, strongly smelling annual herb, 40-100 cm tall. Stem simple or laxly branched, weak, bluntly 4-angular, pubescent with spread hairs. Leaves decussate, elliptical to oval, 4-6 ´ 2-3 cm; base cuneate; apex acute; margin uregularly surate, flowers and fruits throughout the year.

This plant distributes in many provinces of Vietnam (Sonla, Laichau, Laocai, Caobang, Hagiang, Langson, Phutho, Thuathien-Hue, Gialai, Kontum, Ninhthuan, Kiengiang provinces)

The essential oil yield of the above ground part of this plant was at 0.13 percent by air-dry material. This essential oil was analysed by GC/MS and its 26 constituents were identified. The main contituents of this oil were: 1h-cyclopropa (a) naphthalen, 1a. octahydrro - tetramethyl (7.30%); b-panasinsen (41.72%), a- panasisen (11.96%).

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