Compounds of the formula I in which R1 denotes CONR4R5, R2 denotes H or A, R4 and R5, independently of one another, each denote H or A1, R3 denotes Hal, Hal denotes F, Cl, Br or I, A denotes alkyl having 1-4 carbon atoms, A1 denotes alkyl having 1-10 carbon atoms, X denotes alkylene having 1-4 carbon atoms, in which an ethylene group may also be replaced by a double or triple bond, and their physiologically acceptable salts and/or solvates, as phosphodiesterase VII inhibitors, and their use for the preparation of a medicament.