Compounds of formula (I):
##STR00001##
wherein: R.sup.1, R.sup.2, R.sup.3, R.sup.4 and X are as defined in the
description, A represents an alkylene chain as defined in the
description, B represents an alkyl or alkenyl group substituted by a
group
##STR00002##
or R.sup.7, or B represents a group
##STR00003##
or R.sup.7.
Medicinal products containing the same which are useful as hypoglycaemic
and hypolipaemic agents.
