Variation and regularity of volatile oil constituents in fruits of national medicine Cinnamomum migao

OBJECTIVE: To compare the constituents of the volatile oil in Cinnamomum migao from different regions of southwest in China in order to evaluate the quality of C. migao. METHOD: GC-MS was employed to analyze the constituents of the volatile oil in C. migao. RESULT: The volatile oil compositions of C. migao collected from 27 of cultivation regions were obviously different. Based on the chemical differences of the volatile oil compositions, C. migao was divided into four chemotype, they were eucalyptol, eucalyptol -cyclohexene, eucalyptol -alpha-terpineol, and eucalyptol -sabinene. The eucalyptol-type was cultivated in Luodian, guizhou province and Funing regions, Yunan province. The eucalyptol-cyclohexene-type was cultivated in Zhengfeng and Wangmo regions, Guizhou province. The type of eucalyptol, eucalyptol -sabinene and eucalyptol -alpha-terpineol were cultivated in Ceheng and Libo regions, Guizhou province. CONCLUSION: Combined with the geographical distribution, It is indicated that the volatile oil compositions in fruit of C. migao may have some relations to the specie itself characteristics and different elevations environment.