2-(3-Ethyl-4-oxo-5-pyrrolidin-1-yl-2-thiazolidinylidene)acetic acid ethyl ester 74007-93-5 Acetic acid, 2-(3-ethyl-4-oxo-5-pyrrolidin-1-yl-2-thiazolidinylidene)-, ethyl ester BRN 1009906 delta(sup 2,alpha)-Thiazolidineacetic acid, 3-ethyl-4-oxo-5-pyrrolidin-1-yl-, ethyl ester