| abstract |
The invention provides a compound of Formula I Formula I wherein R1 is aryl or heteroaryl each of which is optionally substituted with one or more of the following R3, -OR3, -OCOR3, -COOR3, -COR3, -CONR3R4, -NHCOR3, -NR3R4, -NHSO2R3, -SO2R3, -SO2NR3R4, -SR3, CN, halogeno or NO2; R2 is NO2, NH2, -NR5R6 or -NR6R7; as a free base or a pharmaceutically acceptable salt, solvate or solvate of salt thereof, a process for their preparation, pharmaceutical formulations containing said compounds and to the use of said compounds in therapy. |