Phorbine, magnesium deriv.; Chlorophyll b; Chlorophyll-; ?-Chlorophyll; (SP-4-2)-[(2E,7R,11R)-3,7,11,15-tetramethyl-2-hexadecenyl (3S,4S,21R)-9-ethenyl-14-ethyl-13-formyl-21-(methoxycarbonyl)-4,8,18-trimethyl-20-oxo-3-phorbinepropanoato(2-)-?N23,?N24,?N25,?N26]-Magnesium