Table 2.
CRTH2 IC50a |
|||
---|---|---|---|
compd | R | in buffer (μM) | in plasma (μM) |
5 | H | 0.005 | 0.060 |
6 | 4-F | 0.003 | 0.009 |
7 | 3,4-F | 0.006 | 0.015 |
8 | 4-Cl | 0.007 | 0.022 |
9 | 3-Cl | 0.008 | 0.078 |
10 | 2,4-Cl | 0.029 | 0.24 |
11 | 4-Me | 0.015 | 0.104 |
12 | 4-CF3 | 0.030 | ND |
13 | 4-OCF3 | 0.070 | ND |
Displacement of 3H-PGD2 from the CRTH2 receptors expressed on HEK 293 cells. Assay run in buffer containing 0.5% bovine serum albumin or in 50% plasma. See ref (26) for assay protocol. Values are the means of three experiments, and the standard deviation is ±30%.