中文摘要：

首次进行中国特有菊科藏药臭蚤草（Pulicaria insignis Drumm.ex Dunn）的化学成分研究,从全草中分离得到11个倍半萜类化合物,通过波谱数据分析分别鉴定为Xanthanolide（1）,（3αR,4αR,5R,7αS,9αS）-5-Hy-droxy-5-methyl-3,8-dimethylenedecahydroazuleno[6,5-β]furan-2（3H）-one（2）10α-Hydroxy-14H-inuviscolide（3）,（3R,3αR,4αS,7αS,8S,9αS）-3,4α,8-Trimethyldecahydroazuleno[6,5-β]furan-2,5-dione（4）8-Epi-conferti（5）,（3αR,5S,11αS,E）-5-Hydroxy-10-methyl-3,6-dimethylene-3α,4,5,6,7,8,11,11α-octahydrocyclodeca[α]furan-2（3H）-one（6）,（3αR,8αR,9αR）-5,8α-Dimethyl-3-methylene-3α,4,8,8α,9,9α-hexahydronaphtho[2,3-β]furan-2,6（3H,7H）-dione（7）,Pterodonoic acid（8）,8-Epi-isovangustin（9）,（3αR,4αS,8R,8αR,9αR）-8-Hydroxy-5,8α-dime-thyl-3-methylene-3,3α,4,4α,8,8α,9,9α-octahydronaphtho[2,3-β]furan-2（7H）-one（10）,（5S,8αR,9αR）-3-（Hydroxymethyl）-5,8α-dimethyl-6,7,8,8α,9,9α-hexahydronaphtho[2,3-β]furan-2（5H）-one（11）。所有化合物均首次从该植物中分离得到,同时补充了文献中化合物6和9所缺少的碳谱数据。

英文摘要：

Eleven known sesquiterpenoids were isolated from the Tibetan Folk Drug Pulicaria insignis.On the basis of MS and NMR data,they were identified as Xanthanolide（1）,（3αR,4αR,5R,7αS,9αS）-5-Hydroxy -5-methyl-3,8-dimethylenedecahydroazulenofuran-2（3H）-one（2）,10α-hydroxy-14H-inuviscolide（3）,（3R,3αR,4αS,7αS,8S,9αS）-3,4α,8-Trimethyldecahydroazulenofuran-2,5-dione（4）,8-Epi-conferti（5）,（3αR,5S,11αS,E）-5-Hydroxy-10-methyl-3,6-dimethylene-3α,4,5,6,7,8,11,11α,-octahydrocyclodeca[α] furan-2（3H）-one（6）,（3αR,8αR,9αR）-5,8α-Dimethyl-3-methylene-3α,4,8,8α,9,9α-hexahydronaphtho furan-2,6（3H,7H）-dione（7）,Pterodonoic acid（8）,8-Epi-isovangustin（9）,（3αR,4αS,8R,8αR,9αR）-8 -Hydroxy-5,8α-dimethyl-3-methylene-3,3α,4,4α,8,8α,9,9α-octahydronaphthofuran-2（7H）-one（10） （5S,8αR,9αR）-3-（Hydroxymethyl）-5,8α-dimethyl-6,7,8,8α,9,9α-hexahydronaphthofuran-2（5H） one（11）.All compounds were isolated from this plant for the first time,and the 13C NMR data of compounds 6 and 9 were shawed in this paper.