Patent ID: 8242107

Claim:
A compound of formula I wherein R 1 , R 2 are, independently from each other, alkyl or cycloalkyl, wherein the cycloalkyl is optionally substituted by alkyl or hydroxyl, or R 1 , R 2 and the nitrogen to which they are attached form a saturated mono or bicyclic ring containing 6-10 atoms, optionally containing one further N, S or O atom and optionally substituted by a Hal, alkyl, hydroxyl, ═O (carbonyl oxygen) or aryl, or heteroaryl, R 3 is alkyl, cycloalkyl, phenyl or heteroaryl, wherein the phenyl or heteroaryl is optionally substituted by a Hal, alkyl, C 1 -C 4 -alkyloxy, trifluoromethyl, trifluoromethoxy, C 1 -C 4 -alkyloxycarbonyl, C 1 -C 4 -alkylcarbonyl or R 4 R 5 NC 1 -C 4 -alkyloxy, and R 4 , R 5 are, independently from each other, C 1 -C 4 alkyl or C 4 -C 8 -cycloalkyl, or a pharmaceutically acceptable salt thereof.