| 4'-(methylsulfonyl)-2-(4-phenyl-1-piperazinyl)-acetophenon hydrazone |
| 1-(4-methylsulfonylphenacyl)-4-phenylpiperazine hydrazone |
| 4'-(methylsulfonyl)-2-(4-phenyl-1-piperazinyl)acetophenone hydrazone |
| 1-(4-(methylsulfonyl)phenyl)-2-(4-phenyl-1-piperazinyl)-ethanon hydrazone |
