68366-98-3 Glutamic acid, N-(N-(p-(((2,4-diamino-6-pteridinyl)methyl)methylamino)benzoyl)-DL-alanyl)-, L- L-Glutamic acid, N-(N-(4-(((2,4-diamino-6-pteridinyl)methyl)methylamino)benzoyl)-DL-alanyl)- N-(N-(4-(((2,4-Diamino-6-pteridinyl)methyl)methylamino)benzoyl)-DL-alanyl)-L-glutamic acid N-(N-(p-(((2,4-Diamino-6-pteridinyl)methyl)methylamino)benzoyl)-D,L-alanyl)-L-glutamic acid