Two new epimeric pairs of iridoid from mangrove plant Scyphiphora hydrophyllacea

Two new epimeric pairs of iridoid scyphiphin A(1) (1a), A2 (1b) and scyphiphin B-1 (2a), B-2 (2b) were isolated from Scyphiphora hydrophyllacea Gaertn. F. Their structures were elucidated by spectroscopic methods. The mixture of scyphiphin B-1 and scyphipbin B-2 showed moderate cytotoxicity against human hepatoma SMMC-7721 cell line in vitro by MTT method. (c) 2007 Wen Li Mei. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.