The present invention relates to a pharmaceutical composition comprising as
an active ingredient a compound of formula (I), wherein Ring A is an
aromatic or a heterocyclic ring; Q is a bond, carbonyl, lower alkylene,
lower alkenylene, --O-- -(lower alkylene)-, etc.; n is 0, 1 or 2; Z is
oxygen or sulfur; W is oxygen, sulfur, --CH.dbd.CH--, --NH-- or
--N.dbd.CH--; R.sup.1, R.sup.2 and R.sup.3 are the same or different and
are hydrogen, halogen, hydroxyl, a substituted or unsubstituted lower
alkyl gorup, a substituted or unsubstituted lower alkoxy group, a
substituted or unsubstituted amino group, etc.; R.sup.4 is tetrazolyl,
carboxyl group, amide or ester; R.sup.5 is hydrogen, nitro, amino,
hydroxyl, lower alkanoyl, lower alkyl, etc.; R.sup.6 is selected from (a)
a substituted or unsubstituted phenyl group, (b) a substituted or
unsubstituted pyridyl group, (c) a substituted or unsubstituted thienyl
group, (d) a substituted or unsubstituted benzofuranyl group, etc.; or a
pharmaceutically acceptable salt thereof.
