Oligomeric proanthocyanidin glycosides of Rhodiola pamiroalaica. II

In a continuation of investigations of proanthocyanidins of the roots of Rh odiola pamiroalaica, we have isolated proanthocyanidins RP-3 and RP-4. Thei r compositions, structures, and relative configurations have been investiga ted: RP-3 is 7-O-(6-O-galloyl-beta-D-Glcp)-3-O-galloyl-(-)-epigallocatechin -(4 beta-8)-[(-)epicatechin-(4 beta-8)-(3-O-galloyl-(-)-epigallocatechin)]( 2)-(4 beta-8)-[5-O-(beta-D-Glcp) (6) under right arrow O-beta-D-Glcp)-(+)-c atechin], and RP-4 is 7-O-(6-O-galloyl-beta-D-Glcp-3-O-galloyl-(-)-epigallo catechin-(4 beta-8)-[3-O-galloyl-(-)-epicatechin]-(4 beta-8)-[3-O-galloyl-( -)-epigallocatechin]-(4 beta-8)-[3-O-galloyl-(-)-epicatechin]-(4 beta-8)-[3 -O-galloyl-5-(beta-D-Glcp-(6) under right arrow O-beta-D-Glcp)-(-)-epigallo catechin.