Pyrrole alkaloids from Bolbostemma paniculatum

Three pyrrole alkaloids were isolated from Bolbostemma paniculatum . Their structures were elucidated as 4-(2-formyl-5-methoxymethylpyrrol-1-yl)butyric acid methyl ester ( 1 ), 2-(2-formyl-5-methoxymethylpyrrol-1-yl)-3-phenylpropionic acid methyl ester ( 2 ) and alpha -methyl pyrrole ketone ( 3 ) by spectroscopic techniques. Among them, 1 and 2 are new compounds.