| abstract |
A compound of the formula (I), and pharmaceutically acceptable salts thereof: ##STR1## wherein: R 1 is a C 1-6 alkoxy group; n R 2 and R 3 are the same or different and are hydrogen, halogen, CF 3 , C 2-7 acyl, C 2-7 acylamino, or amino, aminocarbonyl or aminosulphone optionally substituted by one or two C 1-6 alkyl groups, C 1-6 alkylsulphone or nitro; n R 5 is hyrogen or C 1-6 alkyl; n R 6 is C 1-7 alkyl or a group --(CH 2 ) s R 7 where s is 0 to 2 and R 7 is a C 3-8 cycloalkyl group, or a group --(CH 2 ) t R 8 where t is 1 or 2 and R 8 is C 2-5 alkenyl or a phenyl group optionally substituted by one or two substituents selected from C 1-6 alkyl, C 1-4 alkoxy, trifluoromethyl and halogen; and n n, p and q are independently 0 to 2; have useful pharmacological activity. |