| abstract |
The invention describes compounds of the general formula IA (see general formula IA) or the pharmaceutically acceptable salts thereof, wherein R1, R2, R4 and R5 have the meanings defined in the description, a process for obtaining them, medicaments that They contain as well as the use of these compounds as pharmaceutically active agents. These compounds have activity as antiproliferative agents and can be especially useful for the treatment of cancer. |