Patent ID: 7468369

Claim:
A compound of the formula Ia: wherein: R1 is selected from (C 1 -C 6 )-alkyl, where one or more hydrogens in the alkyl radical may be replaced by fluorine; phenyl, (C 1 -C 8 )-alkylene-phenyl, heterocyclyl, (C 1 -C 8 )-alkylene-heterocyclyl, where the phenyl or heterocycle radical may be substituted one or more times by a substituent selected from F, Cl, Br, NO 2 , COO—(C 1 -C 6 )-alkyl, (C 1 -C 6 )-alkylene-O—(C 1 -C 6 )-alkyl, OCF 3 , (C 1 -C 6 )-alkyl, CO—(C 1 -C 6 )-alkyl, phenyl, SCF 3 , and SF 5 ; and the heterocycle is selected from the group consisting of thiophene, quinoline, oxadiazole, isoxazole and pyridine and may be fused to a benzene ring; R2 is selected from phenyl and heterocycle, where the phenyl or heterocycle radical may be substituted one or more times by a substituent selected from F, Cl, Br, NO 2 , COO—(C 1 -C 6 )-alkyl, (C 1 -C 6 )-alkylene-O—(C 1 -C 6 )-alkyl, OCF 3 , (C 1 -C 6 )-alkyl, CO—(C 1 -C 6 )-alkyl, phenyl, SCF 3 , and SF 5 and the heterocycle is selected from the group consisting of dioxole, tetrahydrofuran, isoxazole, oxazine, thiophene and pyridine and may be fused to a benzene ring; and R3 and R4 are, independently of one another, selected from H, F, Cl, Br, NO 2 , COO—(C 1 -C 6 )-alkyl, (C 1 -C 6 )-alkylene-O—(C 1 -C 6 )-alkyl, OCF 3 , (C 1 -C 6 )-alkyl, CO—(C 1 -C 6 )-alkyl, phenyl, SCF 3 , and SF 5 ; where the compound of the following formula is excluded or a physiologically tolerated salt thereof.