The molecule is trianion of 5,10-methylenetetrahydromethanopterin arising from deprotonation of phosphate and carboxy groups; major species at pH 7.3. It is an organophosphate oxoanion and a dicarboxylic acid dianion. It is a conjugate base of a 5,10-methylenetetrahydromethanopterin.
(2S)-2-[[(2R,3S,4R,5S)-5-[(2R,3S,4S)-5-[4-[(6S,6aR,7R)-3-amino-6,7-dimethyl-1-oxo-2,5,6,6a,7,9-hexahydroimidazo[1,5-f]pteridin-8-yl]phenyl]-2,3,4-trihydroxypentoxy]-3,4-dihydroxyoxolan-2-yl]methoxy-oxidophosphoryl]oxypentanedioate