The present invention relates to bicyclic heterocycles of general formula ##STR1##

wherein

    • Ra to Rd, A to G and X are defined as in claim 1, the tautomers, the steroisomers and the salts thereof, particularly the physiologically acceptable salts thereof with inorganic or organic acids or bases which have valuable pharmacological properties, particularly an inhibiting effect on signal transduction mediated by tyrosine kinases, their use for treating diseases, particularly tumoral diseases, diseases of the lungs and respiratory tract, and the preparation thereof.

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    > Phenylethynyl and styryl derivatives of imidazole and fused ring heterocycles

    > Certain substituted polyketides, pharmaceutical compositions containing them and their use in treating tumors
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