| alpha-(1-propynyl)-cyclopentaneglycolic aci (1-methyl-3-pyrrolin-3-yl)methy |
| 3-(1-methyl-3-pyrroline)methyl cyclopentyl(1-propynyl)glycolate |
| 2-cyclopentyl-2-hydroxy-3-pentynoic aci (1-methyl-3-pyrrolin-3-yl)methyl |
| alpha-(1-propynyl)-cyclopentaneglycolic aci(1-methyl-3-pyrrolin-3-yl)methyl ester |
