Synonyms: 2H-Pyran-2-one, 6-((1E,3Z,5R,7E,9E,11R,13S,14R,15S)-3-ethyl-14-hydroxy-5,9,11,13,15-pentamethyl-12-oxo-1,3,7,9-heptadecatetraenyl)-5,6-dihydro-, (6R)-;2H-pyran-2-one, 6-[(1E,3Z,5R,7E,9E,11R,13S,14R,15S)-3-ethyl-14-hydroxy-5,9,11,13,15-pentamethyl-12-oxo-1,3,7,9-heptadecatetraen-1-yl]-5,6-dihydro-, (6R)-;2H-Pyran-2-one, 6-[(1E,3Z,5R,7E,9E,11R,13S,14R,15S)-3-ethyl-14-hydroxy-5,9,11,13,15-pentamethyl-12-oxo-1,3,7,9-heptadecatetraenyl]-5,6-dihydro-, (6R)-