| abstract |
The present invention relates to compounds of formula (I) and pharmaceutically acceptable salts thereof: (I) Wherein R 1 , R 2 , R 3 and X are as defined herein. The present invention also relates to pharmaceutical compositions comprising such compounds, as well as methods of making and using the compounds of formula (I). The compounds of formula I are antagonists or partial agonists at the CRTH2 receptor and may be useful for the treatment of diseases and disorders associated with receptors, such as asthma. |