| 3-(3-phenyl-2-propynyl)-8-propionyl-8-diazabicyclo(3.2.1)octane |
| 3-(phenylethynylmethyl)-8-propionyl-8-diazabicyclo(3.2.1)octane |
| 3-(3-phenyl-2-propynyl)-8-propionyl-3,8-diazabicyclo(3.2.1)octane |
| 3-(3-phenyl-2-propynyl)-8-propionyl-8-diazabicyclo(3.2.1)octane |
