Abstract:
The present invention provides compounds of the formula (1): ##STR1## wherein R. sub. 1 and R. sub. 2 each independently represent hydrogen, hydroxy, F, Cl, Br, I, CN, 1 to 6 carbon alkyl, 1 to 6 carbon alkoxy, nitro, CF. sub. 3 and phenyloxy or benzyloxy, in which the aromatic ring can be optionally substituted by from 1 to 3 groups selected from C. sub. 1 -C. sub. 6 alkoxy (preferably OMe), F, Cl, Br, I, and CF. sub. 3 ; R. sub. 3 and R. sub. 4 are each independently a hydrogen, a 1 to 6 carbon alkyl or a CH. sub. 2 Ph in which the phenyl ring can be optionally substituted by from 1 to 3 groups selected from C. sub. 1 -C. sub. 6 alkoxy (preferably OMe), F, Cl, Br, I, and CF. sub. 3 ; Y is selected from CH. sub. 2 or CH and, X is selected from a group represented by N, CR. sub. 3, CHR. sub.