1-[[(3R)-2,3,4,7,8,8aβ-Hexahydro-3β,8,8-trimethyl-3aα,7α-methano-1H-azulen]-6-yl]-2-propanone

[3R-(3alpha,3abeta,7beta,8aalpha)]-1-(2,3,4,7,8,8a-hexahydro-3,8,8-trimethyl-1H-3a,7-methanoazulen-6-yl)acetone