. . . . . . "5-Formiminotetrahydrofolate" . . . . . "5-Formiminotetrahydrofolate" . . . . "(2S)-2-{[4-[(2-Amino-5-methanimidoyl-4-oxo-1,6,7,8-tetrahydropteridin-6-yl)methylamino]benzoyl]amino}pentanedioic acid" . . .