1-Methyl-4-piperidyl isopropyl(3-methylbut-1-yn-3-enyl)glycolate 101564-60-7 3-HEXYN-5-ENOIC ACID, 2-HYDROXY-2-ISOPROPYL-5-METHYL-, 1-METHYL-4-PIPERIDYL ESTE 3-Hexyn-5-enoic acid, 2-hydroxy-2-isopropyl-5-methyl-, 1-methyl-4-piperidyl ester