773786-94-0 Magnesate(2-), [7,12-diethenyl-3,8,13,17-tetramethyl-21H,23H-porphine-2,18-dipropanoato(4-)-N21,N22,N23,N24]-, (SP-4-2)- (9CI) Mg-Protoporphyrin Mg-Protoporpyrin IX