The molecule is a W-molybdopterin cofactor comprising two molecules of molybdopterin guanine dinucleotide attached via their sulfur atoms to a central tungsten atom. It is a molybdopterin dinucleotide and a W-molybdopterin cofactor. It is a conjugate acid of a tungsten-bis(molybdopterin guanine dinucleotide)(4-).
2-amino-8-[[[[(2R,3S,4R,5R)-5-(2-amino-6-oxo-1H-purin-9-yl)-3,4-dihydroxyoxolan-2-yl]methoxy-hydroxyphosphoryl]oxy-hydroxyphosphoryl]oxymethyl]-4-oxo-3,5,5a,8,9a,10-hexahydropyrano[3,2-g]pteridine-6,7-dithiolate;tungsten