Compound of the formula in which R 1A and R 1B independently of one another represent hydrogen, methyl, ethyl or n -propyl or are attached to one another and together with the carbon atom to which they are attached form a cyclopropyl or cyclobutyl ring, R 2A represents hydrogen, methyl, ethyl, n -propyl, isopropyl, cyclopropyl, methoxy, ethoxy or cyclopropyloxy, R 2B represents hydrogen or methyl, or R 2A and R 2B are attached to one another and together with the carbon atom to which they are attached form a cyclopropyl or cyclobutyl ring, R 3 represents hydrogen, fluorine, chlorine, methyl, trifluoromethyl or ethyl, R 4A and R 4B independently of one another represent methyl, trifluoromethyl or ethyl or are attached to one another and together with the carbon atom to which they are attached form a cyclopropyl, cyclobutyl or cyclopentyl ring which may be substituted up to two times by fluorine and A represents an optionally substituted or fused piperidine ring of the formula wherein * denotes the point of attachment to the remainder of the molecule, R 5A represents hydrogen, (C 1 -C 4)-alkyl, cyclopropyl, cyclobutyl, methoxy, ethoxy or phenyl, where (C 1 -C 4)-alkyl for its part may be substituted up to three times by fluorine, R 5B represents hydrogen or methyl, or R 5A and R 5B are attached to one another and together with the carbon atom to which they are attached form a cyclopropyl or cyclobutyl ring, and R 6 represents hydrogen, fluorine, chlorine, methyl or trifluoromethyl, and their salts, solvates and solvates of the salts. R 1A and R 1B independently of one another represent hydrogen, methyl, ethyl or n -propyl or are attached to one another and together with the carbon atom to which they are attached form a cyclopropyl or cyclobutyl ring, R 2A represents hydrogen, methyl, ethyl, n -propyl, isopropyl, cyclopropyl, methoxy, ethoxy or cyclopropyloxy, R 2B represents hydrogen or methyl, R 2A and R 2B are attached to one another and together with the carbon atom to which they are attached form a cyclopropyl or cyclobutyl ring, R 3 represents hydrogen, fluorine, chlorine, methyl, trifluoromethyl or ethyl, R 4A and R 4B independently of one another represent methyl, trifluoromethyl or ethyl or are attached to one another and together with the carbon atom to which they are attached form a cyclopropyl, cyclobutyl or cyclopentyl ring which may be substituted up to two times by fluorine A represents an optionally substituted or fused piperidine ring of the formula wherein * denotes the point of attachment to the remainder of the molecule, R 5A represents hydrogen, (C 1 -C 4)-alkyl, cyclopropyl, cyclobutyl, methoxy, ethoxy or phenyl, where (C 1 -C 4)-alkyl for its part may be substituted up to three times by fluorine, R 5B represents hydrogen or methyl, or R 5A and R 5B are attached to one another and together with the carbon atom to which they are attached form a cyclopropyl or cyclobutyl ring, and R 6 represents hydrogen, fluorine, chlorine, methyl or trifluoromethyl, and their salts, solvates and solvates of the salts. R 5A represents hydrogen, (C 1 -C 4)-alkyl, cyclopropyl, cyclobutyl, methoxy, ethoxy or phenyl, where (C 1 -C 4)-alkyl for its part may be substituted up to three times by fluorine, R 5B represents hydrogen or methyl,