C[C@@H]1CCC(=O)[C@@H]2C=C[C@@H]3[C@@H](C3(C)C)[C@@]12C	(1aR,3aR,7R,7aR,7bS)-1,1,7,7a-tetramethyl-1a,3a,5,6,7,7b-hexahydrocyclopropa[a]naphthalen-4-one