Synonyms: 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)-; Manganate(2-),[7,12-diethenyl-3,8,13,17-tetramethyl-21H,23H-porphine-2,18-dipropanoato(4-)-kN21,kN22,kN23,kN24]-, dihydrogen, (SP-4-2)-(9CI); Manganese, [dihydrogen3,7,12,17-tetramethyl-8,13-divinyl-2,18-porphinedipropionato(2-)]- (8CI);Manganese, [dihydrogen protoporphyrin IX-ato(2-)]- (7CI);21H,23H-Porphine-2,18-dipropanoic acid, 7,12-diethenyl-3,8,13,17-tetramethyl-,manganese complex; Manganese protoporphyrin IX; Manganese(II) protoporphyrinIX; Manganese-protoporphyrin; NSC 267104; Protoporphyrin manganese complex