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