4-(2-Amino-4-oxo-3,5,7,8-tetrahydro-4H-1,3,6,9-tetraaza-anthracen-6-yl)-benzoic acid

2-acetamido-7-(4-carboxyphenyl)-5-deaza-6,7,8,9-tetrahydro-4(3H)-pyrido<3,4-g>pteridinone