69997-72-4 Manganate(1-), (7,12-bis(1-hydroxyethyl)-3,8,13,17-tetramethyl-21H-23H-porphine-2,18-dipropanoato(2-)-N21,N22,N23,N24)-, hydrogen, (SP-4-2)- Manganese (III) hematoporphyrin Mn(III) Hematoporphyrin