. . . . "5,10-Methenyltetrahydrofolate" . . . . "5,10-Methenyltetrahydrofolate" . . . . "N-[4-(3-amino-1-oxo-1,4,5,6,6a,7-hexahydro-8H-imidazo[1,5-f]pteridin-10-ium-8-yl)benzoyl]-(L)-glutamic acid" . . . . . . "5,10-CH=THF" .