Chemical composition of Vitex trifolia L

The chemical composition of the petroleum ether extract, methanol extract and essential oil of Vitex trifolia L were analyzed by GC/MS method. The major compounds of the petroleum either extract were found to be a-pinene, sabinene,1,8-cineole, -terpinyl acetate, methyl-8,11,14-heptadecatrienoat and squalan. An alcaloid isoindol derivate was isolated from methanol extract of Vitex trifolia L. fruit

Chemical components of essential oil of Piper nigrum L. and essential oil of Piper betle L. in Nghe An province

Chemical components of essential oil of Piper nigrum L. and essential oil of Piper betle L. were identified by GC/MS method. The main constituents in essential oil of Piper nigrum L. are D-limonene, alpha-pinene, beta-pinene and D3-carene. The main components of essential oil of Piper betle L. are eugenyl acetate or isoeugenyl acetate, alylpyrocatechol diacetate, eugenol or isoeugenol, caryophylen