| alpha-(1-propynyl)-1-cyclopenteneglycolic aci 3-quinuclidinyl ester |
| 2-(1-cyclopentenyl)-2-hydroxy-3-pentynoic aci 3-quinuclidinyl ester |
| 3-quinuclidinyl cyclopentenyl(1-propynyl)glycolate |
| alpha-(1-propynyl)-1-cyclopenteneglycolic aci3-quinuclidinyl ester |
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