The invention concerns a compound of the Formula (I) wherein m is 0-2 and each R.sup.1 is a group such as hydroxy, halogeno, trifluoromethyl heterocyclyl and heterocyclyloxy; R.sup.2 is halogeno, trifluoromethyl or (1-6C)alkyl; R.sup.3 is hydrogen, halogeno or (1-6C)alkyl; and R.sup.4 is (3-6C)cycloalkyl; or pharmaceutically-acceptable salts thereof; processes for their preparation, pharmaceutical compositions containing them and their use in the treatment of diseases or medical conditions mediated by cytokines. ##STR00001##