| alpha-(3-methylbut-ynyl)-cyclopentaneglycolic aci 2-methyl-3-quinuclidinyl |
| 2-methyl-3-quinuclidyl cyclopentyl(3-methyl-1-butynyl)glycolate a |
| 2-methyl-3-quinuclidyl cyclopentyl(3-methyl-1-butynyl)glycolate b |
| alpha-(3-methylbut-ynyl)-cyclopentaneglycolic aci2-methyl-3-quinuclidinyl ester |
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