The molecule is a monocarboxylic acid anion resulting from the removal of a proton from the carboxylic acid group of trans-heme d hydroxychlorin gamma-spirolactone. It is a conjugate base of a trans-heme d hydroxychlorin gamma-spirolactone.
3-[(2S,17'S)-8',13'-bis(ethenyl)-17'-hydroxy-3',7',12',17'-tetramethyl-5-oxospiro[oxolane-2,18'-porphyrin-21,23-diide]-2'-yl]propanoate;iron