Patent ID: 8178724

Claim:
A compound selected from the group consisting of: 4-[2-Dimethylamino-1-(1-hydroxycyclohexyl)-ethyl]-phenyl benzoate; 4-[2-Dimethylamino-1-(1-hydroxycyclohexyl)-ethyl]-phenyl 4-methylbenzoate; 4-[2-Dimethylamino-1-(1-hydroxycyclohexyl)-ethyl]-phenyl 4-methoxybenzoate; 4-[2-Dimethylamino-1-(1-hydroxycyclohexyl)-ethyl]-phenyl 4-flourobenzoate; 4-[2-Dimethylamino-1-(1-hydroxycyclohexyl)-ethyl]-phenyl 2-carboxylbenzoate; 4-[2-Dimethylamino-1-(1-benzoyloxycyclohexyl)-ethyl]-phenyl benzoate; 4-[2-Dimethylamino-1-(1-(4-methyl)benzoyloxycyclohexyl)-ethyl]-phenyl 4-methylbenzoate; 4-[2-Dimethylamino-1-(1-(4-methoxy)benzoyloxycyclohexyl)-ethyl]-phenyl 4-methoxybenzoate; 4-[2-Dimethylamino-1-(1-(4-fluoro)benzoyloxycyclohexyl)-ethyl]-phenyl 4-fluorobenzoate; 4-[2-Dimethylamino-1-(1-benzoyloxycyclohexyl)-ethyl]-phenyl 4 -methylbenzoate; 1-[2-Dimethylamino-1-(1-benzoyloxycyclohexyl)-ethyl]-cyclohexyl 4 -methoxybenzoate; 4-[2-Dimethylamino-1-(1-(4-methoxy)benzoyloxycyclohexyl)-ethyl]-phenyl 4-methylbenzoate; 4-[2-Dimethylamino-1-(1-benzoyloxycyclohexyl)-ethyl]-phenyl N-methylcarbamate; 4-[2-Dimethylamino-1-(1-benzoyloxycyclohexyl)-ethyl]-phenyl N,N-dimethylcarbamate; and 4-[2-Dimethylamino-1-(1-benzoyloxycyclohexyl)-ethyl]-phenyl ethylcarbonate, or pharmaceutically acceptable salts and optical isomers thereof.