1,8-Dimethyl-4-(1-methylethyl)spiro(4.5)dec-8-en-7-one (1S-(1alpha,4alpha,5beta))- 5956-05-8 Spiro(4.5)dec-8-en-7-one, 1,8-dimethyl-4-(1-methylethyl)-, (1S-(1alpha,4alpha,5beta))-