The molecule is the 5,10-methenyl derivative of tetrahydrofolic acid arising from enzymatic cyclisation of 5-formyltetrahydrofolic acid. It has a role as an Escherichia coli metabolite and a mouse metabolite. It derives from a (6R)-5,10-methylenetetrahydrofolic acid. It is a conjugate acid of a (6R)-5,10-methenyltetrahydrofolate.
(2S)-2-[[4-[(6aR)-3-amino-1-oxo-5,6,6a,7-tetrahydro-2H-imidazo[1,5-f]pteridin-10-ium-8-yl]benzoyl]amino]pentanedioic acid