1-Methyl-4-piperidyl cyclopentyl(3-methyl-but-1-yn-3-enyl)glycolate 92956-70-2 Cyclopentaneglycolic acid, alpha-(3-methylbut-1-yn-3-enyl)-, 1-methyl-4-piperidyl ester alpha-(3-Methylbut-1-yn-3-enyl)cyclohexaneglycolic acid 1-methyl-4-piperidyl ester