85(PA3-5) 杜仲の成分(ポスター発表の部)

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The bark of Eucommia ulmoides Oliv. (Eucommiaceae) is the origin of the crude drug, Eucommiae Cortex which has been used as a staminal tonic and hypotensor in China and Japan. In this paper, we describe the isolation and structure determination of ten new lignans, (-)-olivil 4',4"-di-O-β-D-glucopyranoside(2), (+)-1-hydroxypinoresinol 4',4"-di-O-β-D-glucopyranoside(5), (+)-1-hydroxypinoresinol 4"-O-β-D-glucopyranoside(18), (+)-medioresinol di-O-β-D-glucopyranoside(11), eucommin A[(+)-medioresinol 4'-O-β-D-glucopyranoside] (26), dehydrodiconiferyl alcohol 4,γ'-di-O-β-D-glucopyranoside(7), erythro-dihydroxydehydrodiconiferyl alcohol(21), and its threo-isomer(22), hedyotol C 4",4'''-di-O-β-D-glucopyranoside (guaiacylglycerol-β-medioresinol ether 4",4'''-di-O-β-D-glucopyranoside) (10), and syringylglycerol-β-syringaresinol ether 4",4'''-di-O-β-D-glucopyranoside(16). Characteristic glucosylation shifts were observed among phenols(guaiacyl and syringyl groups) and their 4-O-β-D-glucopyranosides.
1987-07-25