50714-21-1 Bis(1-methylethyl) N-(4-(((2,4-diamino-6-pteridinyl)methyl)methylamino)benzoyl)-L-glutamate L-Glutamic acid, N-(4-(((2,4-diamino-6-pteridinyl)methyl)methylamino)benzoyl)-, bis(1-methylethyl) ester