abstract |
The present invention provides compounds of formula (I) and pharmaceutically acceptable salts thereof, wherein R 1 , R 2 , A 1 , A 2 , A 3 , A 4 , X and Y have any values defined in this specification , which are useful as agents for the treatment of diseases and conditions including inflammatory diseases, cancer and AIDS. Also provided are pharmaceutical compositions comprising one or more compounds of formula (I). |