Chemical Evaluation of Betula Species in Japan. IV. Constituents of Betula davurica.
摘要：
The constituents of Betula davurica PALL. were identified as follows: Fresh leaves: 12-O-acetylbetulafolienetetraol oxide I,5,8-dihydroxy-6,7-dimethoxyflavone,rutin. Outer bark: betulin, betulin 3-O-caffeate, oleanolic acid, oleanolic acid 3-O-acetate, 3 beta-acetoxy-12 alpha-hydroxyoleanan-28, 13 beta-olide, betulinic acid 3-O-caffeate, oleanolic acid 3-O-caffeate, betulonic acid. Inner bark: acerogenin E, (3R)-3,5'-dihdroxy-4'-methoxy-3',4 "-oxo-1,7-diphenyl-1-heptene, 17-O-methyl-7-oxoacerogenin E*, 15-methoxy-17-O-methyl-7-oxoacerogenin E*, (-)-lyoniresinol 3 alpha-O-beta-D-xylopyranoside (=nudiposide), (+)-catechin, (+)-catechin 7-O-beta-D-xylopyranoside, 3,4,5-trimethoxyphenol beta-D-apiofuranosyl-(1-->6)-beta-D-glucopyranoside, monogynol A, roseoside. Root bark: betulin 3-O-caffeate, 3 beta,27-dihydroxyolean-12-en-28-oic acid 27-O-caffeate. The two compounds with an asterisk are new.
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DOI：
10.1248/cpb.46.166
被引量：
年份：
1998
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