sodium (2S)-2-[[4-[(2-amino-4-oxo-1H-pteridin-6-yl)methylamino]benzoyl]amino]-5-hydroxy-5-oxopentanoate
sodium (2S)-2-[[4-[(2-amino-4-oxo-1H-pteridin-6-yl)methylamino]benzoyl]amino]-5-hydroxy-5-oxo-pentanoate
sodium (2S)-2-[[[4-[(2-amino-4-oxo-1H-pteridin-6-yl)methylamino]phenyl]-oxomethyl]amino]-5-hydroxy-5-oxopentanoate
sodium (2S)-2-[[4-[(2-amino-4-keto-1H-pteridin-6-yl)methylamino]benzoyl]amino]-5-hydroxy-5-keto-valerate
sodium (2S)-2-[[4-[(2-amino-4-oxo-1H-pteridin-6-yl)methylamino]phenyl]carbonylamino]-5-hydroxy-5-oxo-pentanoate