2-(2-amino-4-oxo-1,3-thiazol-5-yl)acetic acid (2-imino-4-oxo-1,3-thiazolidin-5-yl)acetic acid 5-thiazolidineacetic acid, 2-imino-4-oxo- 5-Thiazoleacetic acid,2-aMino-4,5-dihydro-4-oxo- 2-(2-amino-4-keto-thiazol-5-yl)acetic acid 2-(2-amino-4-oxo-1,3-thiazol-5-yl)ethanoic acid 2-(2-amino-4-oxo-5-thiazolyl)acetic acid 2-(2-amino-4-oxo-thiazol-5-yl)acetic acid