Patent ID: 7268154

Claim:
A compound of formula (I) wherein R 1 is —(CRR′) n -aryl, —(CRR′) n -heteroaryl, —(CRR′) n —O-aryl or —(CRR′) n —O-heteroaryl, wherein the aryl or heteroaryl groups are unsubstituted or substituted by one or two substituents selected from the group consisting of halogen, lower alkyl, lower alkoxy, and lower alkyl substituted by halogen, or is unsubstituted or substituted phenyl, wherein the substitution on the phenyl group is lower alkyl or halogen, or is —(CRR′) n -2-benzo[1.3]dioxolyl; R and R′ are each independently selected from hydrogen and lower alkyl or are together with the carbon atom to which they are attached a cycloalkyl group; R 2 and R 3 are each independently selected from hydrogen, lower alkyl, phenyl and cycloalkyl or together with the N-atom to which they are attached form a five or six membered saturated heterocycle; n is 0 or 1; or a pharmaceutically suitable acid addition salt, enantiomer, diastereoisomer, or racemic mixture thereof.