[(2R,3S,4R)-5-(5,6-dimethylbenzimidazol-1-yl)-2-(hydroxymethyl)-4-oxidanyl-oxolan-3-yl] [(2R)-1-[3-[(1R,2R,3R,5Z,7S,10Z,12S,13S,15Z,17S,18S,19R)-2,13,18-tris(2-azanyl-2-oxidanylidene-ethyl)-7,12,17-tris(3-azanyl-3-oxidanylidene-propyl)-3,5,8,8,3,15,18,19-octamethyl-2,7,12,17-tetrahydro-1H-corrin-24-id-3-yl]propanoylamino]propan-2-yl] phosphate
vitamin B12 is a metabolite found in or produced by Escherichia coli (strain K12, MG1655).