(-)-7-((6-chloro-2-naphthalenyl)sulfonyl)tetrahydro-8a-(methoxymethyl)-1'-(4-pyridinyl)-spiro(5H-oxazolo(3,2-a)pyrazine-2(3H),4'-piperidin)-5-one
(-)-7-((6-chloro-2-naphthalenyl)sulfonyl)tetrahydro-8a-(methoxymethyl)-1'-(4-pyridinyl)-spiro(5h-oxazolo(3,2-a)pyrazine-2(3h),4'-piperidin)-5-one