桦树皮化学成分研究

Studies on the Chemical Constituents of the Bark of Betula platyphylla

首次从白桦树皮中分离得到4个纯化合物,经鉴定为游离羟基二聚体缩合鞣质B_1(Ⅲ)、B_2(Ⅳ)及其前体化合物(+)-catechin(Ⅰ)、(—)-epicatechin(Ⅱ)。

The paper deals with the saperating of free phenolic hydroxyl dipolymer condensution-tannis B1 > B2 md the compounds ( + )-catechin, ( - )-epicatechin from the bark of Betula platyphylla. Their structures have been evaluated hy means of 1H,13C-NMR technique and chemical ways.