Table 2. Inhibitory activity of compounds 9d–e and 10k on the HDAC nuclear extract at 0.5 μM.
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| Compd. | R1 | R2 | Inhibition% | log P |
| 9d | CH3CH2 NHCO- | 4′-OCH3 | 51% | 2.85 |
| 9e | CH3CH2 NHCO- | 4′-OH | 21% | 2.53 |
| 10k | 4-F–Ph(CH2)2NHCO- | 4′-OCH3 | 53% | 4.16 |
| 10l | 4-F–Ph(CH2)2CONH- | 4′-OCH3 | 49% | 4.52 |
| SAHA | — | — | 46% | 1.88 |