(1S,2S,4aS,8aR)-2,5,5,8a-tetramethyl-1-[(3R)-3-methylpentyl]-1,2,3,4,4a,6,7,8-octahydronaphthalene (4aR,5S,6S,8aS)-1,1,4a,6-tetramethyl-5-[(3R)-3-methylpentyl]decalin CHEBI:36505 labdane