3H-4,8a-propano-1H-2-benzopyran-1-one, 8-[2-(2,5-dihydro-2-oxo-3-furanyl)ethyl]hexahydro-4-methyl-7-methylene-, (4R,8R,8aR)- 7-Methyl-3-methylene-2-[2-(2-oxo-2,5-dihydro-furan-3-yl)-ethyl]-9-oxa-tricyclo[5.3.3.0^(1,6)]tridecan-10-one 8(17),13-ent-Labdadien-15-