(3S,3aR,6S)-7-Methoxy-3,6-dimethyl-2,3,3a,4,5,6-hexahydro-phenalen-1-one

rel-(3R,7S,9R,9aS)-3,6,9-trimethyl-7-(2-methylprop-1-en-1-yl)-2,3,7,8,9,9a-hexahydro-1H-phenalene-4,5-diol