(7R)-7-((1E,3E,5E,7E)-8-((2S,5R,6S)-5-Hydroxy-3,5,6-trimethyl-5,6-dihydro-2H-pyran-2-yl)-1,3,5,7-nonatetraen-1-yl)-4,6,7-trimethyl-2-oxabicyclo(2.2.1)heptane-3,5-dione
(7r)-7-((1e,3e,5e,7e)-8-((2s,5r,6s)-5-hydroxy-3,5,6-trimethyl-5,6-dihydro-2h-pyran-2-yl)-1,3,5,7-nonatetraen-1-yl)-4,6,7-trimethyl-2-oxabicyclo(2.2.1)heptane-3,5-dione