Synonyms: 7-Pteridinecarboxylicacid, 2-amino-1,4,5,6-tetrahydro-4,6-dioxo- (9CI); 7-Pteridinecarboxylic acid,2-amino-3,4,5,6-tetrahydro-4,6-dioxo- (7CI); 7-Pteridinecarboxylic acid,2-amino-4,6-dihydroxy- (6CI,8CI); Xanthopterin-7-carboxylic acid;Xanthopterincarboxylic acid