2-[[4-[(2-amino-4-oxo-1H-pyrido[3,2-d]pyrimidin-6-yl)methylsulfanyl]benzoyl]amino]pentanedioic acid

2-[[4-[(2,4-diaminopyrido[3,2-d]pyrimidin-6-yl)methyl-methylamino]benzoyl]amino]pentanedioic acid

2-[[4-[(2,4-diaminopyrido[3,2-d]pyrimidin-6-yl)methylsulfanyl]benzoyl]amino]pentanedioic acid