The molecule is a precorrin carboxylic acid anion that is the tetraanionic form of hydrogenobyrinic acid. It is the major microspecies at pH 7.3 (according to Marvin v 6.2.0.). It is a conjugate base of a hydrogenobyrinic acid. It is a conjugate acid of a hydrogenobyrinate(6-).
3-[(1R,2S,3S,5Z,7S,8S,9Z,13S,14Z,17R,18R,19R)-3,13,17-tris(2-carboxylatoethyl)-2,7,18-tris(carboxylatomethyl)-1,2,5,7,12,12,15,17-octamethyl-3,8,13,18,19,22-hexahydrocorrin-21,23,24-triium-8-yl]propanoate