Patent ID: 7772253

Claim:
A compound of the formula I: wherein R 1 is selected from the group consisting of ethyl, 2-fluoroethyl, isopropyl and isobutyl; R 2 is phenyl, phenyl substituted by one to three substituents selected from the group consisting of halogen, halogen-C 1-7 -alkyl and halogen-C 1-7 -alkoxy, imidazolyl and pyrrolyl; R 3 is selected from the group consisting of hydrogen, C 1-7 -alkoxy, amino, —NH—C(O)-R 8 , wherein R 8 is C 1-7 -alkyl, —O-benzyl and —O-tetrahydropyranyl; or R 2 and R 3 are bonded to each other to form a ring together with the carbon atoms they are attached to and R 2 and R 3 together are —CH═CH—NH—; R 4 is selected from the group consisting of hydrogen, halogen, pyridyl and pyrimidyl; R 5 and R 5′ independently from each other are selected from hydrogen or methyl; A is pyridyl or pyridyl substituted by one or two substituents selected from the group consisting of C 1-7 alkyl, amino, C 1-7 alkylamino, cyano and halogen; and pharmaceutically acceptable salts thereof.