Patent ID: 6946466

Claim:
A compound of formula I in which R 1 is a C 5 -C 6 -alkylene-containing ring which may optionally be substituted one or more times by C 1 -C 6 -alkyl and which ring is interrupted by one or more nitrogen, sulfur or oxygen atoms and may contain one or more possible double bonds in the ring, or is a C 3 -C 12 -heteroaryl, which may optionally be substituted one or more times, identically or differently, by halogen, hydroxyl, C 1 -C 6 -alkyl or C 1 -C 6 -alkoxy, R 2 and R 3 form a C 5 -C 6 -alkylene-containing ring together with the nitrogen atom, which may optionally be substituted by C 1 -C 4 -alkyl, and R 4 is hydrogen, hydroxyl, nitro, halogen, C 1 -C 6 -alkyl, COOH, CF 3 or C 1 -C 6 -alkoxy, or an the isomer, diastereomer, enantiomer thereof, or a salt thereof, wherein the compound of formula I is not