6-carboxypterin, Pterine-6-carboxylic acid,2-Amino-4-hydroxypteridine-6-carboxylicacid, 2-amino-1,4-dihydro-4-oxopteridine-6-carboxylic acid, 2-amino-4-oxo-3,4-dihydro-pteridine-6-carboxylic acid, 2-azanyl-4-oxo-1H-pteridine-6-carboxylic acid, pterin-6-carboxylate, 2-amino-4-keto-1H-pteridine-6-carboxylic acid, pterin-6-carboxylic acid, 2-Amino-4-oxo-3,4-dihydro-pteridin-6-carbonsaeure, PTERINE-6-CARBOXYLIC ACID