Synonyms: Magnesate(1-),[21-methyl(21R)-3-[(1E)-2-carboxyethenyl]-3,4-didehydro-9,14-diethenyl-4,8,13,18-tetramethyl-20-oxo-21-phorbinecarboxylato(3-)-kN23,kN24,kN25,kN26]-, hydrogen, (SP-4-2)- (9CI);Magnesate(1-), [21-methyl3-(2-carboxyethenyl)-3,4-didehydro-9,14-diethenyl-4,8,13,18-tetramethyl-20-oxo-21-phorbinecarboxylato(3-)-kN23,kN24,kN25,kN26]-, hydrogen, [SP-4-2-(E)]-;Magnesium, [dihydrogen21-carboxy-3,4-didehydro-4,8,13,18-tetramethyl-20-oxo-9,14-divinyl-3-phorbineacrylato(2-)]-,21-methyl ester, (E)- (8CI); 21-Phorbinecarboxylic acid,3-(2-carboxyethenyl)-3,4-didehydro-9,14-diethenyl-4,8,13,18-tetramethyl-20-oxo-,21-methyl ester, magnesium complex, (E)-; Phorbine, magnesate(1-) deriv.;Chlorophyll c2; Chlorophyllide c2; Magnesate(1-), [21-methyl3-(2-carboxyethenyl)-3,4-didehydro-9,14-diethenyl-4,8,13,18-tetramethyl-20-oxo-21-phorbinecarboxylato(3-)-N23,N24,N25,N26]-,hydrogen, [SP-4-2-(E)]-;trans-7',7''-Dehydro-2,4-bisdeethyl-2,4-divinylpheoporphyrin a5 10-methyl estermagnesium complex