25663-26-7 33611-85-7 33981-84-9 35409-54-2 37793-57-0 6713-32-2 L-Glutamic acid, N-(N-(N-(N-(N-(4-(((2-amino-1,4-dihydro-4-oxo-6-pteridinyl)methyl)amino)benzoyl)-L-gamma-glutamyl)-L-gamma-glutamyl)-L-gamma-glutamyl)-L-gamma-glutamyl)- NSC 372667 Pte-penta-glu Pteroylpentaglutamate Pteroylpentaglutamic acid