| 1-hydroxy-alpha-phenyl-cyclopentaneacetic aci 1-methyl-4-piperidyl ester |
| 1-hydroxy-alpha-phenylcyclopentaneacetic acid 1-methyl-4-piperidyl ester |
| 1-methyl-3-piperidyl(1-hydroxycyclopentyl)phenylacetate |
| 1-hydroxy-alpha-phenyl-cyclopentaneacetic aci1-methyl-4-piperidyl ester |
