Patent ID: 7645887

Claim:
A compound of the formula I or a pharmaceutically acceptable salt thereof or stereoisomeric forms thereof, wherein R 1 is hydrogen, R 2 is hydrogen or C 1-20 -alkyl, R 3 is hydrogen, C 1-20 -alkyl, C 4-8 -cycloalkyl, C 5-8 -cycloalkylenyl, aryl, C 1-20 -alkoxy, or a group of formula —W-R 8 ; R 3a is hydrogen or C 1-20 -alkyl, R 4 is hydrogen, R 5 is halogen or trifluoromethyl, R 6 is hydrogen, C 1-20 -alkyl or halogen, R 7 is hydrogen, C 1-20 -alkyl or halogen, W is C 1-12 -alkylene, —NH— or —NHC(═O)—, and R 8 is aryl.