4-[(2-amino-4-oxo-7,8-dihydro-1H-pteridin-6-yl)methylamino]benzoate 4-[(2-amino-4-keto-7,8-dihydro-1H-pteridin-6-yl)methylamino]benzoate 4-{[(2-amino-4-oxo-3,4,7,8-tetrahydropteridin-6-yl)methyl]amino}benzoate CHEBI:17839