GC-MS analysis of essential oil from different organs of Mikania micrantha

To reveal the volatile chemical components and their relative content from different organs of Mikania micrantha,constituents of essential oil extracted by simultaneous distillation and extraction(SDE) from inflorescence, stem, leaf and petiole of M.micrantha, were analyzed by gas chromatography/mass spectrometry(GC-MS). Results showed that 66 compounds were identified in the inflorescence, and the main components were Terpinolene(17.89%), β-Cubebene(9.89%), β-Caryophyllene(6.64%), trans-Ocimen(4.61%), α-Zingiberene+EPI-Cubenol(4.12%), γ-Terpinene(4.01%), Cubenol(4.01%), Limonene(3.83%), α-Caryophyllene(3.74%), β-Pinene(3.64%) and Germacrene-D(3.20%). 61 compounds were identified in the stem, and the main components were β-Pinene(21.77%),β-Phellandrene(11.64%), β-Caryophyllene(5.89%), Cubenol(5.84%), β-Cubebene(5.38%), α-Caryophyllene(3.99%), Terpinolene(3.50%),α-Pinene(3.46%), α-Zingiberene(3.37%) and Epizonaren(3.13%). 56 compounds were identified in the leaf, and the main components were β-Cubebene(17.44%), trans-Ocimene(8.93%), β-Caryophyllene(8.39%), β-Phellandrene(6.29%), Germacrene-D(5.99%), Cubenol(5.90%), β-Pinene(4.90%), α-Pinene(3.69%) and Aristolone(3.36%). 46 compounds were identified in the petiole, and the main components were β-Cubebene(19.77%), β-Caryophyllene(13.68%), Germacrene-D(8.72%), Cubenol(6.27%), δ-Cadinene(5.64%), α-Caryophyllene(4.18%), Epizonaren(3.54%) and β-bisabolene(3.05%).