130160-18-8 14076-60-9 14947-11-6 Divinyl-Mg-protoporphyrin Magnesate(2-), (7,12-diethenyl-3,8,13,17-tetramethyl-21H,23H-porphine-2,18-dipropanoato(4-)-N21,N22,N23,N24)-, dihydrogen, (SP-4-2)- Magnesium protoporphyrin Mg Protoporphyrin Mgproto