Abstract
由下列4 種台灣產苦味藥用植物單離出之成分, 經各種光譜分析與化學方法鑑定其構造式, 歸納如下:1.苦蘵(Physalis angulata L.)withangulatin A(1), withangulatin B(2).2.山芝麻(Helicteres angustifolia L.)根皮之成分mansonone E(6), mansonone F(z), mansonone m(10), betulin (11), 3-O-acetylbetulin (12),3-O-trans-p-coumaroyl betulin (13), 3-O-cis-p-coumaroyl betulin (14), 3-O-trans-caffeoyl betulin (15), 3-O-trans-feruloyl betulin (16),3-O-trans-p-coumaroyl betulinic acid(17), 3-O-cis-p-coumaroyl betulinic acid(18), 3-O-trans-caffeoyl betulinic acid(pyracrenic acid)(19), 3-O-trans- eruloyl betulinic acid(20), methyl 3β-acetoxy-27-trans-cinnamoyloxy-lup-20(29)-en-28-oate(22), methyl 3β–acetoxy-27-p-hydroxybenzoyloxy-lup-20-(29)-en-28-oate (22), methyl 3β-acetoxy-27-p-hydroxybenzoyloxy-lup-20(29)-en-28-oate(24), arvenin I(25), arvenin Ⅲ(26), helicteroside A (27), helicteroside B(29), cucurbitacin B 2-sulphate (31), takakin 8-O-β-D glucuronide(32), takakin 8-O-β-D-glucuronide 6" -methyl ester (35), takakin 8-O-β-D-glucuronide 2" -sulphate (36), takakin 8-O-β-D-glucoside(37).果實之成分kaempferol 3-O-β-D-glucoside(astragalin)(38), kaempferol 3-O-β-D-(6"-O-p-coumaroyl) glucoside(tiliroside)(39).3.免仔菜(Ixeris chinensis Nakai)8-epicrepiside G (40),8-epidesacylcynaropicrin glucoside (42), ixerin D (43), luteolin 7-O-β-D-glucopyranosyl-(1←6)-β-D-glucoyranoside(44).4.台灣薄公英(Taraxacum formosanum Kitamura)taraxinic acid 1’-O-β-D-glucoyranoside (46).化合物1, 2, 10, 13, 14, 16, 17, 18, 20, 22, 24, 27, 29, 31, 35, 36, 40是新化合物(17個). 25, 26, 27, 29, 31, 40, 42, 43, 46具有苦味(9 個)。