| pyrrolidine, 1-((1-(4-(4-fluorophenyl)-4-oxobutyl)-4-(3-methylphenyl)-4-piperid |
| inyl)car bonyl)- |
| 1-((1-(4-(4-fluorophenyl)-4-oxobutyl)-4-(3-methylphenyl)-4-piperidinyl)c arbo |
| nyl)pyrrolidine |
| meperidide |
| methylperidide |
| 1-(1-(3-(p-fluorobenzoyl)propyl)-4-m-tolylisonipecotoyl)-pyrrolidin |
| r 2963 |
| 1-((1-(4-(4-fluorophenyl)-4-oxobutyl)-4-(3-methylphenyl)-4-piperidinyl)car bonyl)-pyrrolidin |
