(2R,5R,6R)-8-[((6R,8R)-3,3,8-Trimethyl(2H-3,4,5,6,7,8,4a,8a-octahydro-4,7-dioxachromen-6-yloxy))methyl]-1-formyl-5-methyl-10-(methylethyl)tetracyclo[7.4.0.0<2,6