摘要:
Two new dimeric hydrolyzable tannins, isorugosin E and hirtellin B, have been respectively isolated from Liquidambar formosana (Hamamelidaceae) and Reaumuria hirtella (Tamaricaceae), and their structures 7 and 15, in which two monomers are linked through a trisgalloyl group (valoneoyl or hellinoyl group), have been elucidated based on high resolution NMR techniques. Hirtellin B exhibited a potent host-mediated antitumor activity.