(R)-2-((2R,5S,6S)-5-Methyl-6-propionyloxy-tetrahydro-pyran-2-yl)-propionic acid methyl ester

(1S,3aR,4S,5S,7aS)-1-Ethyl-5-{(1E,3E)-4-[(2R,3S,6R)-6-((R)-1-methoxycarbonyl-ethyl)-3-methyl-tetrahydro-pyran-2-yl]-hexa-1,3-dienyl}-2,3,3a,4,5,7a-hexahydro-1H-indene-4-carboxylic acid