Patent ID: 7776900

Claim:
A compound of the general formula (I): or an N-oxide thereof, any of its stereoisomers or any mixture of its stereoisomers, or a pharmaceutically acceptable salt thereof, wherein R a represents halo, trifluoromethyl, trifluoromethoxy, cyano, nitro, R c , R c O—, R c O-alkyl-, R c —O—N═(CR d )—, R c —(C═O)—, R c —(C═O)-alkyl-, R c —(C═O)—(NR d )—, R c —(C═O)—(NR d )-alkyl-, or R c —O—(C═O)—; wherein R c is hydrogen, alkyl, cycloalkyl, cycloalkylakyl, alkenyl, or alkynyl; which alkyl, cycloalkyl, cycloalkylakyl, alkenyl, and alkynyl is optionally substituted with one or more azido or R′R″N—; wherein R′ and R″ independent of each other are hydrogen or alkyl or R′ and R″ together with the together with the nitrogen to which they are attached form a pyrrolidine or piperidine ring; R d is hydrogen or alkyl; R b represents an aryl or a heteroaryl group; which aryl or heteroaryl group is optionally substituted with one or more substituents independently selected from the group consisting of: halo, hydroxy, R′″R″″N—, R′″R″″N-alkyl, cyano, nitro, trifluoromethyl, trifluoromethoxy, alkoxy, cycloalkoxy, alkyl, cycloalkyl, cycloalkylalkyl, alkenyl, and alkynyl; wherein R′″ and R″″ independent of each other are hydrogen or alkyl; and X represents —O—, NR e ; wherein R e represents hydrogen or alkyl.