| Name | First Run | Second Run | Third Run | Mean ± SD |
|---|---|---|---|---|
| Forskolin | 0.32 | 0.25 | 0.25 | 0.27±0.04 |
| 8-(4-Chlorophenylthio)-cAMP | 25.12 | 25.12 | 15.85 | 22.03±5.35 |
| 8-Bromo-cAMP | 25.12 | 15.85 | 25.12 | 22.03±5.35 |
| Papaverine hydrochloride | 1.58 | 0.79 | 0.79 | 1.06±0.46 |
| Trequinsin (HL-725) | 2.51 | 1.58 | 1.26 | 1.79±0.65 |
| Rolipram | 1.26 | 1.26 | 2.00 | 1.50±0.43 |
| Ro 20-1724 | 5.01 | 12.59 | 2.00 | 6.53±5.46 |
| Etazolate hydrochloride | 12.59 | 15.85 | 15.85 | 14.76±1.88 |
| Ibudilast | 10.00 | 12.59 | 12.59 | 11.73±1.49 |
| Tracazolate | 5.01 | 5.01 | 5.01 | 5.01±0.00 |
| T-1032 | 12.59 | 12.59 | 12.59 | 12.59±0.00 |
| 3-Isobutyl-1-methylxanthine 8-Methoxymethyl-3-isobutyl- | 15.85 | 15.85 | 15.85 | 15.85±0.00 |
| 1-methylxanthine | 25.12 | 15.85 | 15.85 | 18.94±5.35 |
| Propentofylline | 25.12 | 25.12 | 15.85 | 22.03±5.35 |
| Zardaverine | 10.00 | 15.85 | 12.59 | 12.81±2.93 |