Phenylalkan(en)oic acid

A phenylalkan(en)oic acid of the formula:

• ##STR201## wherein A, taken together with W and R.sup.1, is ##STR202## Y is ethylene or vinylene;
• D is:
• i) --Z--B or
• ii) ##STR203## Z is C3-11 alkylene or alkenylene B is:
• ##STR204## or Z, taken together with B, is C3-22 alkyl;
• R.sup.3 is:
• i) hydrogen,
• ii) halogen,
• iii) C1-8 alkyl, alkoxy or alkylthio or
• iv) C2-8 alkenyl, alkenyloxy or alkenylthio;
• n is 1-3;
• R.sup.4 is C1-7 alkylene;
• R.sup.5 is:
• i) C1-12 alkyl,
• ii) C2-12 alkenyl,
• iii) C5-7 cycloalkyl or
• iv) phenethyl or phenethyl wherein the ring is substituted by one C1-4 alkoxy;
• with the proviso that:
• --A--W--R.sup.1 should bind to 3- or 4-carbon in benzene ring, and non-toxic salts thereof.