(S)-4,5-dihydro-2-(6-hydroxybenzothiazol-2-yl)thiazole-4-carboxylic acid
(2Z,4S)-2-(6-oxo-1,3-benzothiazol-2(6H)-ylidene)-1,3-thiazolidine-4-carboxylic acid; (2E,4S)-2-(6-oxo-1,3-benzothiazol-2(6H)-ylidene)-1,3-thiazolidine-4-carboxylic acid; 2-(6-hydroxy-1,3-benzothiazol-2-yl)-4,5-dihydro-1,3-thiazole-4-carboxylic acid