Fused benzeneoxyacetic acid derivatives

A fused benzeneoxyacetic acid derivative of the formula (I):

• ##STR153## R.sup.1 is (i) hydroxy,
• (ii) C.sub.1-12 alkoxy or
• (iii) NR.sup.2 R.sup.3 ;
• R.sup.2 and R.sup.3 each, independently, is
• (i) hydrogen atom or
• (ii) C.sub.1-4 alkyl or
• R.sup.2 and R.sup.3 together with the nitrogen atom is an amino acid;
• R.sup.4 each, independently, is
• (i) hydrogen atom,
• (ii) C.sub.1-4 alkyl,
• (iii) phenyl or
• (iv) C.sub.1-4 alkyl substituted with one or two rings optionally selected from 4-7 membered monocyclic hetero ring containing one or two nitrogen atoms, and phenyl;
• when R.sup.4 is phenyl or a group containing phenyl or a 4-7 membered monocyclic hetero ring containing one or two nitrogen atoms, said phenyl and hetero ring may be substituted with one to three of C.sub.1-4 alkyl, C.sub.1-4 alkoxy, halogen atom, nitro group or trihalomethyl group;
• e is 3-5;
• f is 1-3;
• m is 1 or 2;
• p is 1-4;
• q is 0-2;
• r is 1-4;
• and s is 0-3;
• with the provisos that,
• (1) when A is ##STR154## and R.sup.4 is a hydrogen atom, q or s is not zero;
• (2) when A is ##STR155## and R.sup.4 is a C.sub.1-4 alkyl substituted with a hetero ring, a hetero ring in R.sup.4 is bonded to the alkyl via a carbon atom in the hetero ring;
• (3) --(CH.sub.2).sub.r -- or .dbd.CH--(CH.sub.2).sub.s -- is bonded to the carbon atom at the a or b position of the ring;
• (4) and when A is ##STR156## R.sup.4 is a C1-4 alkyl group substituted with one or two 4-7 membered monocyclic hetero rings containing one or two nitrogen atoms;
• or non-toxic salts thereof or non-toxic acid addition salts thereof.