【化学成分】含黄酮甙、酚类、氨基酸。
1.全草中分得香叶木素(diosmetin)。木犀草素-7-O-葡萄糖醛酸甙(luteolin-7-O-glucuronide),木犀草素(lute-olin),木犀草素-7-O-葡萄糖甙(luteolin-7-O-glucoside)。 2.从新鲜花中分得木犀草素,木犀草素-7-O-葡萄糖甙,异荭草素(isoorientin),金对草素(chrysoeriol)。
3.从根中分得5,17(20)豆甾二烯[stigmast-5,17(20)-dien-3β-ol],36-甲基二十七碳酸(36-methylheptacosanoic acid),豆甾醇(stigmasterol),谷甾醇(sitosterol),α、β-香树脂醇(α、β-amyrin),ξ-香树脂乙酸酯(ξ-amyrin acetate),α-、β-香树脂醇乙酸酯(α-、β-amyrin acetate)。3β-乙酰氧基-13(18)-乌苏烯[3β-ace-toxyrus-13(18)-ene],24-羟基-14-蒲公英赛烯(24-hydroxy-taraxer-14-ene)。
4.地上部分含8α-巴豆酰氧基-硬毛钩藤内酯-13-O-乙酸酯(8α-tigloyloxyhirsutinolide-13-O-acetate),8α-(羟异丁烯酰氧基)-硬毛钩藤内酯-13-乙酸酯[8α-(hydroxymethacryloyloxy)-hirsuti-nolide-13-O-acetate],斯梯诺妥曼内酯-8-O-巴豆酸酯(stilpnoto-mentolide-8-O-tiglate),8α-(4-羟异丁烯酰)-10α-羟基硬毛钩藤内酯-13-乙酸酯[8α(4-hydroxymethacryloyloxy)-10α-hydroxyhirsu-tinolide-13-O-acetate)-10α-hydroxyhirsu-tinolide-13-O-acetate],8α-(4-羟基巴豆酰氧基)-10α-羟基硬毛钩藤内酯-13-O-乙酸酯[8α-(4-hydroxytigloyloxy)-10α-hydroxyhir-sutinolide-13-O-acetate],8α-(4-羟基巴豆酰氧基)硬毛钩藤内酯-13-O-乙酸酯[8α-(4-hydroxytigloyloxy)-hirsutinolide-13-O-aceta-te],白前内酯(glaucolide)E,19-羟基白前内酯E(19-hydroxyglau-colide )E,夜香牛内酯-8-O-(4-羟异丁烯酸酯)[vernocinerolide-8-O-(4-hydroxymethacrylate)]。