Patent ID: 7115639

Claim:
A compound according to formula I: a geometrical isomer thereof, an optically active form thereof, an enantiomer thereof, a diastereomer thereof, a racemate thereof, or a pharmaceutically acceptable salt thereof, wherein: A is selected from the group consisting of —(C═O)—, —(C═O)—O—, —SO 2 —, —SO 2 NH—, and —CH 2 —; B is an unsubstituted or substituted oxadiazole or unsubstituted or substituted thiadiazole ring; R 1 is selected from the group consisting of C 1 –C 6 -alkyl, C 2 –C 6 -alkenyl, C 2 –C 6 -alkynyl, aryl, heteroaryl, C 1 –C 6 alkyl aryl, and C 1 –C 6 alkyl heteroaryl, wherein R 1 can form with the O atom to which it is attached a 3–8 membered, saturated or unsaturated heterocyclic ring which may contain 1–2 further heteroatoms selected from the group consisting of N, S and O and which is optionally fused with an aryl, heteroaryl or 3–8 membered saturated or unsaturated cycloalkyl ring; R 2 is selected from the group consisting of C 1 –C 6 -alkyl, C 2 –C 6 -alkenyl, C 2 –C 6 -alkynyl, aryl, heteroaryl, heteroarylalkyl, 3–8-membered cycloalkyl, acyl, C 1 –C 6 -alkyl aryl, and C 1 –C 6 -alkyl heteroaryl, wherein said cycloalkyl or aryl or heteroaryl groups may be fused with 1–2 further cycloalkyl or aryl or heteroaryl groups; R 3 , R 4 , R 5 and R 6 are independently selected from the group consisting of hydrogen, halogen, C 1 –C 6 -alkyl and C 1 –C 6 -alkoxy.