Synonyms: 3-Phorbinepropanoicacid, 9-ethenyl-14-ethyl-13-formyl-4,8,18-trimethyl-20-oxo-,(2E,7R,11R)-3,7,11,15-tetramethyl-2-hexadecenyl ester, (3S,4S)- (9CI);3-Phorbinepropanoic acid,9-ethenyl-14-ethyl-13-formyl-4,8,18-trimethyl-20-oxo-,3,7,11,15-tetramethyl-2-hexadecenyl ester, [3S-[3a(2E,7S*,11S*),4b]]-; Pyropheophytin b