179600-03-4

Butanoic acid,2-methyl-,(2R,3R,4S,5S,6R,- 11S)-2-[(1R)-1-(6-ethyl-3,5-dimethyl-4- oxo-4H-pyran-2-yl)ethyl]-2,3,4,5-tetrahydro- 3,5,9,11-tetramethyl-8-[(1R)-1-methylpropyl]- 10-oxo-1,7-dioxaspiro[5.5]undec-8- en-4-yl ester,rel-