Scyphiphorins A and B,Two New Iridoid Glycosides from the Stem Bark of a Chinese Mangrove Scyphiphora hydrophyllacea

摘要

Two new iridoid glycosides,named scyphiphorins A(1)and B(2),together with four known compounds,geniposidic acid(=(1S,4aS,7aS)-1-(beta-D-glucopyranosyloxy)-1,4a,5,7a-tetrahydro-7-(hy-droxymethyl)cyclopenta[c]pyran-4-carboxylic acid;3),4-(4-hydroxy-3-methoxybenzyl)butan-2-one,oleanolic acid(=(3beta)-3-hydroxyolean-12-en-28-oic acid),and stigmasterol beta-D-glucoside(=(3beta,22E)-stigmasta-5,22-dien-3-yl beta-D-glucopyranoside),were isolated for the first time from the stem bark of a Chinese mangrove,Scyphiphora hydrophyllacea GAF.RTN.f.The structures of compounds 1 and 2 were determined as 10-O-benzoylgeniposidic acid and 10-O-[(2E,6R)-8-hydroxy-2,6-dimethyl-1-oxooct-2-en-1-yl]geniposidic acid,respectively,on the basis of spectroscopic data and chemical methods,including 2D NMR techniques.