The molecule is a 5,6-dihydrofolic acid that is (6S)-5,6-dihydrofolic acid substituted at position 5 by a hydroxymethyl group. It is a 5,6-dihydrofolic acid and a hemiaminal.
(2S)-2-[[4-[[(6S)-2-amino-5-(hydroxymethyl)-4-oxo-3,6-dihydropteridin-6-yl]methylamino]benzoyl]amino]pentanedioic acid