Patent ID: 7547703

Claim:
A compound of the formula in which X is an oxygen atom, R 1 is a hydrogen atom, R 2 is a fluorine, chlorine or bromine atom or a cyano group, R 3 is a phenyl group which is substituted by a carboxy-C 1-4 -alkoxy, C 1-4 -alkoxy-carbonyl-C 1-3 -alkoxy, aminocarbonyl-C 1-3 -alkyl, (C 1-2 -alkylamino)-carbonyl-C 1-3 -alkyl, di-(C 1-2 -alkyl)-aminocarbonyl-C 1-3 -alkyl, (C 1-2 -alkyl-carbonyl)-amino-C 1-3 -alkyl, or C 1-3 -alkyl-piperazin-1-yl-carbonyl-C 1-3 -alkyl group, R 4 is a phenyl group which is monosubstituted by a C 1-3 -alkyl group which is terminally substituted by di-(C 1-2 -alkyl)-amino-, imidazol-1-yl, pyrrolidin-1-yl, or by a group of the formula in which R 7 is a C 1-2 -alkyl, C 1-2 -alkyl-carbonyl, or C 1-3 -alkylsulphonyl group and R 8 is ω-[di-(C 1-2 -alkyl)-amino]C 2-3 -alkyl, or a (C 1-3 -alkyl)-carbonyl group which is terminally substituted by a di-(C 1-2 -alkyl)-amino, piperazin-1-yl or 4-(C 1-3 -alkyl)-piperazin-1-yl group, where all dialkylamino groups present in the radical R 4 may also be present in quaternized form, where the counterion is preferably selected from the group consisting of iodide, chloride, bromide, methylsulphonate, para-toluenesulphonate and trifluoroacetate, R 5 is a hydrogen atom and R 6 is a hydrogen atom, where the abovementioned alkyl groups include linear and branched alkyl groups in which additionally one to 3 hydrogen atoms may be replaced by fluorine atoms, where additionally a carboxyl, amino or imino group present may be substituted by an in vivo cleavable radical or may be present in the form of a prodrug radical, or a salt thereof.