1-Methyl-4-piperidyl-2-thienyl(isopropenyl)glycolate 102367-38-4 2-Thiopheneglycolic acid, alpha-isopropenyl-, 1-methyl-4-piperidyl ester 3-Butenoic acid, 2-hydroxy-3-methyl-2-(2-thienyl)-, 1-methyl-4-piperidyl ester alpha-Isopropenyl-2-thiopheneglycolic acid 1-methyl-4-piperidyl ester