(1-Methyl-4-piperidyl)methyl(1-hydroxycyclopentyl)phenylacetate 1-Hydroxy-alpha-phenylcyclopentaneglycolic acid (1-methyl-4-piperidyl)methyl ester 101952-36-7 Cyclopentaneacetic acid, 1-hydroxy-alpha-phenyl-, (1-methyl-4-piperidyl)methyl ester