14319-23-4 21393-64-6 Manganate(2-), (7,12-diethenyl-3,8,13,17-tetramethyl-21H,23H-porphine-2,18-dipropanoato(4-)-N21,N22,N23,N24)-, dihydrogen, (SP-4-2)- Manganese protoporphyrin Manganese protoporphyrin IX Manganese-protoporphyrin Mangano protoporphyrin IX Mn Protoporphyrin NSC 267104