1-Methyl-4-piperidyl 4-(1-carboxycyclohexyl)-3-hydroxy-3-phenylbutyrate gamma-lactone 101834-42-8 2-OXASPIRO(4.5)DECANE-3-ACETIC ACID, 1-OXO-3-PHENYL-, 1-METHYL-4-PIPERIDYL ESTER