2-(3-Methyl-4-oxo-5-pyrrolidin-1-yl-2-thiazolidinylidene)acetic acid ethyl ester 74007-95-7 Acetic acid, 2-(3-methyl-4-oxo-5-pyrrolidin-1-yl-2-thiazolidinylidene)-, ethyl ester delta(sup 2,alpha)-Thiazolidineacetic acid, 3-methyl-4-oxo-5-pyrrolidin-1-yl-, ethyl ester