The present invention comprises compounds of general formula whereinA, X, Y, Z, Ra, Rb, Rc, R1, R2 and R3 are defined as in claim 1, which are suitable for the treatment of diseases characterised by excessive or anomalous cell proliferation, and the use thereof for preparing a pharmaceutical composition with the above-mentioned properties. If the coating is used to adhere a thermal barrier coating, the TBC exhibits improved spallation resistance as a result of the dispersion of ceramic particles having a dispersion-strengthening effect on the overlay coating. Rotor blades are coupled to the generator.