New oligomeric proanthocyanidin glycosides platanoside-A and platanoside-B from <Emphasis Type="Italic">Platanus orientalis</Emphasis> trunk bark |
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| Authors: | S Z Nishanbaev Z A Kuliev N K Khidyrova A D Vdovin N D Abdullaev Kh M Shakhidoyatov O A Aripov |
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| Institution: | (1) Yu. Yunusov Institute of the Chemistry of Plant Substances, Academy of Sciences of the Republic of Uzbekistan, Tashkent, Uzbekistan |
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| Abstract: | Two new oligomeric proanthocyanidin glycosides were isolated from trunk bark of Platanus orientalis. Their structures and relative configurations were found to be 7-O-β-D-Glcp-(–)-epicatechin-(4β-8)-(–)-epicatechin(4β-8)-(–)-epicatechin-3-O-gallate (platanoside-A) and 7-O-β-D-Glc
\textp\xrightarrow6 {\text{p}}\xrightarrow{6} galloyl-(+)-catechin-3-O-gallate(4α-8)-(–)-epicatechin-3-O-gallate-(4β-8)-(–)-epicatechin-3-O-gallate-(4β-8)-5-O-β-D-Glcp-(–)epicatechin-3-O-gallate (platanoside-B). |
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