The constituents from the stem of Cissus assamica Laws.

• Main Authors: Chiu-Yuan Wang, 王秋媛
• Other Authors: Yu-Yi Chan
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/91315504747872049706

碩士 === 南台科技大學 === 生物科技系 === 99 === Fifty-nine compounds were isolated from the fresh stem of Cissus assamica Laws. Among these isolates, fifty-five compounds were characterized by comprensive analyses of their 1D and 2D NMR and mass spectral data. They are a mixture of β- sitosterol(12) and stigmasterol(13), β-sitosteryl glucoside(27), a mixture of 3β- hydro xyl stigmast-5-en-7-one(29) and 3β-hydroxystigmast-5, 22-dien-7-one(31), a mixture of β-sitostenone(49) and stigmasta-4, 22-dien-3-one(48), 6β-hydroxy-β-sitostenone (59), ergosterol peroxide(179), 3, 5, 7, 4'-tetramethoxyflavone(173), 3', 4', 3, 6, 7- pentamethoxyflavone(174), 3', 4', 5, 6, 7-pentamethoxyflavone(175), 4', 5, 6, 7- tetramethoxyflavone(176), a mixture of oleanolic acid(14) and ursolic acid(2), betulinic acid(26), friedelin(28), epi-glut-5(6)-en-ol(38), taraxerol(89), epi-friede linol(100), glutinone (177), 1up-28-al-20(29)-en-3-ol(178), a mixture of α-amyrin (180) and β-amyrin(181), bergenin(7), p-hydroxybenzaldehyde(19), vanillin(57), methyl gallate(59), gallic acid (65), 4-methoxybenzoic acid(126), vanillic acid(130), a mixture of 4-hydroxy–tran scinnamic acid methyl ester(182) and 4-hydroxy-cis- cinnamic acid methyl ester(183), a mixture of octadecyl-trans-ferulate (184) and octadecyl-cis-ferulate(185), 1-(4-methoxyphenyl)undecan-1-one(186), 3-hydroxy-4- methoxybenzoic acid(187), hexadecyl ferulate(188), 2-hydroxybenzoquinone(189), 2, 6-dimethyoxybenzoquinone(190) , 3, 3', 4-tri-O-methylellagic acid(63) , 3, 3', 4, 4' -tetra-O-methylellagic acid(64) , methyl pheophorbide-a(21) , a mixture of methyl-21- hydroxy-(21S)-pheophorbide-a(23) and methyl-21-hydroxy-(21R)-pheophorbide-a (24), methyl-21-hydroxyl-(21S)-pheophorbide-b(25), pheophytin-a(43), α-toco phenol(45), tocopherol trimer IVa(191), tocopherol trimer IVb(192), α-tocospiro B (194), 5, 6-dimethoxy-3-methyl-2-cyclohexa-2, 5-dien-1, 4-dion(195), 3-methyl-8- hydroxy-3, 4-dihydroisocoumarin(196) and methyl linoleate(197)。Among them，1, 2-bis-(5-γ- tocopheryl)ethane(193) is the first reported from natural sources.