Naphthysulfonylalkanoic acid compounds and pharmaceutical compositions thereof

A compound represented by the formula:

• ##STR30## wherein R.sup.1 represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, a cycloalkyl group having 3 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, an alkenyloxy group having 3 to 6 carbon atoms, an acyloxy group having 2 to 5 carbon atoms, a carboxy group, an alkoxycarbonyl group having 2 to 7 carbon atoms, a carbamoyl group of the formula ##STR31## in which R.sup.4 and R.sup.5 are the same or different and are a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, a group of the formula ##STR32## in which X is a single bond, --CH.sub.2 -- or --O--, p and q are the same or different and are an integer of from 0 to 3, with the proviso that the sum of p and q is 2 to 5, or a lactam group of the formula ##STR33## in which r is an integer of from 2 to 5;
• R.sup.2 represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, a cycloalkyl group having 3 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, an alkenyloxy group having 3 to 6 carbon atoms, an acyloxy group having 2 to 5 carbon atoms or an alkoxycarbonyl group having 2 to 7 carbon atoms;
• R.sup.3 represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms or a benzyl group;
• 1 and m are the same or different and are an integer of from 1 to 4;
• n is 1 or 2;
• and pharmaceutically acceptable salts thereof.