1-Methyl-4-piperidyl phenyl (1-propenyl)glycolate 1-Methyl-4-piperidyl phenyl(trans-1-propenyl)glycolate 101711-14-2 MANDELIC ACID, alpha-PROPENYL-, 1-METHYL-4-PIPERIDYL ESTER alpha-Propenylmandelic acid 1-methyl-4-piperidyl ester