2-[[4-[[4-[[4-[(2-amino-4-oxo-1H-pteridin-6-yl)methylamino]benzoyl]amino]-4-carboxy-butanoyl]amino]-4-carboxy-butanoyl]amino]pentanedioic acid | 2-[[4-[[4-[[4-[(2-amino-4-oxo-1H-pteridin-6-yl)methylamino]benzoyl]amino]-5-hydroxy-5-oxopentanoyl]amino]-5-hydroxy-5-oxopentanoyl]amino]pentanedioic acid |
2-[[4-[[4-[[4-[(2-amino-4-keto-1H-pteridin-6-yl)methylamino]benzoyl]amino]-5-hydroxy-5-keto-pentanoyl]amino]-5-hydroxy-5-keto-pentanoyl]amino]glutaric acid | 2-[[4-[[4-[[4-[(2-azanyl-4-oxo-1H-pteridin-6-yl)methylamino]phenyl]carbonylamino]-5-hydroxy-5-oxo-pentanoyl]amino]-5-hydroxy-5-oxo-pentanoyl]amino]pentanedioic acid |