The molecule is a metalloporphyrin that is sirohydrochlorin in which the four nitrogen atoms are bound to a central cobalt atom. It derives from a sirohydrochlorin. It is a conjugate acid of a cobalt-sirohydrochlorin(8-).
cobalt;3-[(2S,3S,7S,8S)-7,13,17-tris(2-carboxyethyl)-3,8,12,18-tetrakis(carboxymethyl)-3,8-dimethyl-2,7-dihydroporphyrin-21,23-diid-2-yl]propanoic acid