目的 研究三裂蟛蜞菊Wedelia trilobata的化学成分。方法 利用硅胶柱色谱技术分离成分,根据理化性质和光谱分析鉴定结构。结果 从三裂蟛蜞菊地上部分分离得到11个化合物,分别鉴定为大花蟛蜞菊烯酸(grandiflorenic acid,4α-kaur-9(11),16-dien-19-oic acid,1)、1α-acetoxy-6α,9β-dihydroxy-4,10α-di methyl-5αH,7αH,8αH-endesm-3-en-8,12-olide(2)、1β-乙酰氧基-4α-羟基-6β-异丁酰氧基-9α-异戊酰氧基卤地菊内酯(1β-acetoxy-4α-hydroxy-6β-isobutyryloxy-9α-isovaleryloxyprostatolide,3)、16α-羟基对映贝壳杉烷-19-羧酸(16α-hydroxy-ent-kau-ran-19-oic acid,4)、(3R,4R,6S)-3,4-二羟基薄荷烯[(3R,4R,6S)-3,4-dihydroxy-1-menthene,5]、6-异丁酰基三裂蟛蜞菊内酯(trilobolide-6-O-isobutyrate,6)、1β-acetoxy-4α,9α-dihydroxy-6β-isobutyroxyprostatolide(7)、16β,17-二羟基对映贝壳杉烷-19-羧酸(16β,17-dihydroxy-ent-kauran-19-oic acid,8)、胡萝卜苷(daucosterol,9)、原儿茶醛(proto-catechualdehyde,10)、咖啡酸(caffeic acid,11)。结论 除化合物6,7外,其他9个化合物均为首次从该植物中分离得到,其中化合物2和3均为新的倍半萜内酯类化合物,分别命名为三裂蟛蜞菊内酯A(trilobolide A)和1β-乙酰氧基-4α-羟基-6β-异丁酰氧基-9α-异戊酰氧基卤地菊内酯。

Objective To investigate the chemical constituents of Wedelia trilobata.Methods The chemical constituents were separated by chromatography and their structures were determined by physico-chemical constants and spectral analyses.Results Eleven compounds were isolated and identified as grandiflorenic acid(1),1α-acetoxy-6α,9β-dihydroxy-4,10α-dimethyl-5αH,7αH,8αH-endesm-3-en-8,12-olide(2),1β-acetoxy-4α-hydroxy-6β-isobutyryloxy-9α-isovaleryloxyprostatolide(3),16α-hydroxy-ent-kauran-19-oic acid(4),(3R,4R,6R)-3,4-dihydroxy-1-menthene(5),trilobolide-6-O-isobutyrate(6),1β-acetoxy-4α,9α-dihydroxy-6β-isobutyroxyprostatolide(7),16β,17-dihydroxy-ent-kauran-19-oic acid(8),daucosterol(9),protocatechualdehyde(10),and caffeic acid(11).Conclusion All the compounds are isolated from W.trilobata for the first time except compounds 6 and 7.Compounds 2 and 3 are new sesquiterpene lactones,named as trilobolide A and 1β-acetoxy-4α-hydroxy-6β-isobutyryloxy-9α-isovaleryloxyprostatolide,respectively.