Convallamaroside (la), the main saponin from Convallarin nzujalis L., is the first example or a 22-hydroxyfurostanol saponin having three independent sugar chains (on C-27, C-3, and C-1).Convallamaroside (1 a or 1 b) lost, by enzymatic hydrolysis, 2 molecules of D-glUCOSC and formcd convallamaronin (2a) by cyclization of the side chain in the aglycon (spirostanol derivative). The structures of thc sugar chains at C-1 and C-3 in ring A of the aglycon were elucidated by mass spectrometry of the permethylated derivatives of 1 b and 2b, by idcntification of the methylated sugars obtained by acid hydrolysis, and by derivatives of the monoglycosides isolated by partial hydrolysis. 3,4-Di-O-methyl-~~-quinovose is reportcd for the first time.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.