magnesium 13(1)-hydroxyprotoporphyrin 13-monomethyl ester(1-)
magnesium 13(1)-hydroxyprotoporphyrin 13-monomethyl ester(1-)
The conjugate base of magnesium 13<small><sup>1</small></sup>-hydroxyprotoporphyrin 13-monomethyl ester, formed by deprotonation of the carboxyethyl group at C-17.  It is  the principal species at pH 7.3.