2-amino-6-(hydroxymethyl)-1H-pyrido[3,2-d]pyrimidin-4-one

6-(bromomethyl)pyrido[3,2-d]pyrimidine-2,4-diamine

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

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

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