(2R,5R,6R)-8-{[(3S,4S,2R,5R,6R)-4-((2Z,4E)Hexa-2,4-dienoyloxy)-3-hydroxy-5-methoxy-6-methyl(2H-3,4,5,6-tetrahydropyran-2-yloxy)]methyl}-1-formyl-5-methyl-10-(methylethyl)tetracyclo[7.4.0.0<2,6