牛尾蒿两变种精油的化学成分

本文以气相色谱质谱计算机联用的方法分析了牛尾蒿原变种Artemisia dubia var. dubia及无毛变种B A. dubia var. subdigitata精油化学成分，共鉴定出82种化合物，其中萜类50种，芳香类12种，脂肪族类20种。经比较研究表明，这两变种的精油中有39种化合物(27 种萜类，5种芳香类和7种脂肪族类化合物)相同，而它们的差别在于牛尾蒿无毛变种中二环、三环倍半萜、芳香类及脂肪族类化合物的类型比原变种多。从精油的萜类化学组成特点来看，这两个变种的萜类化合物环化程度比蒿亚属植物高，而与龙蒿亚属植物相近。因此，这两个变种归属于龙蒿亚属较合适。

CHEMICAL CONSTITUENTS OF ESSENTIAL OIL OF TWO VARIETIES OF ARTEMISIA DUBIA WALL.EX BESS.

The essential oil of Artemisia dubia var. dubia. and A. dubia var. subdigitata were analysed by GC-MS and a tatal of 82 compounds including 50 terpenoids, 12 aromatics and 20 aliphatics were identified, among which variety dubia and var. subdigitata contained 54 and 67 compounds respectively. Comparative studies indicate that 39 compounds (27 terpenoids, 5 aromatics and 7 aliphatics) were shared by the two varieties. The difference in constituents of essential oil between the two varieties is that more types of biocyclic and tri-cyclic sesquiterpenes, aromatics and aliphatics were shown in A. dubia var. subdigitata than A, dubia var. dubia.. Compositionally, the terpenoids in essential oil of the two varieties were endowed with a higher degree of cyclization than those of the species from Subgen. Artemisia, but similar to those of the species from Subgen. Dracunculus. Thus the assignment of the two varieties in Subgen. Dracunculus was consistent with the phylogeny of the genus Artemisia.