Synonyms: Magnesium,[2,3,7,8,12,13,17,18-octaethyl-21H,23H-porphinato(2-)-N21,N22,N23,N24]-,(SP-4-1)-; Magnesium, [2,3,7,8,12,13,17,18-octaethylporphinato(2-)]- (8CI);21H,23H-Porphine, 2,3,7,8,12,13,17,18-octaethyl-, magnesium complex;21H,23H-Porphine, magnesium deriv.; Magnesium octaethylporphin; Magnesiumoctaethylporphine; Magnesium octaethylporphyrin; Magnesium(II)octaethylporphyrin; Octaethylporphyrinatomagnesium