| abstract |
Compounds of formula (I): or a pharmaceutically acceptable salt, solvate, tautomer, stereoisomer, or deuterated analog thereof, wherein A 1 , A 2 , A 3 , A 4 , R 4 , X 1 , X 2 , and X 3 are in the present invention. described in any one of the described embodiments); its composition; and uses thereof. |