Patent ID: 7432293

Claim:
A compound of formula I wherein R 1 is hydroxy, C 1-4 alkoxy, amino, C 1-4 alkyl-amino, di C 1-4 alkylamino, benzyloxy or C 2 -C 7 alkanoyl, R 2 is C 1-4 alkyl, C 1-4 alkoxy, C 1-4 alkoxyC 1-4 alkoxy, CF 3 , halogen, C 1-4 alkylamino, di C 1-4 alkylamino, di C 1-4 alkylamino C 1-4 alkoxy or N—C 1-4 alkoxy C 1-4 alkyl-N—C 1-4 alkylamino, N—C 1-4 alkyl-piperazinyl, morpholinyl or pyrrolidinyl-C 1-4 alkoxy, wherein the C 1-4 alkyl radicals in R 2 are optionally further substituted by C 1-4 alkyl, halogen, amino, alkoxy or alkylthio, X is N or O, Y is N, O or CH, Z is N or CH, and W is N or CH, provided that (a) R 1 is not hydroxy or C 1-4 alkoxy when R 2 is CF 3 , X is O, Y is CH, Z is N and W is CH, (b) R 1 is not hydroxy or C 1-4 alkoxy when R 2 is CF 3 or chloro, X is N, Y is O, Z is CH and W is CH, (c) R 1 is not hydroxy when R 2 is CF 3 , X is O, Y is N, Z is CH and W is CH and (d) X and Y are not simultaneously O, and its salts.