| alpha-(1-propynyl)-2-thiopheneglycolic aci 1-methyl-4-piperidyl ester |
| 1-methyl-4-piperidyl 2-thienyl(1-propynyl)glycolate |
| 2-hydroxy-2-(2-thienyl)-3-pentynoic aci 1-methyl-4-piperidinyl ester |
| alpha-(1-propynyl)-2-thiopheneglycolic acid 1-methyl-4-piperidyl ester |
| alpha-(1-propynyl)-2-thiopheneglycolic aci1-methyl-4-piperidyl ester |
