The present invention relates to a compound formula [I] wherein R1 and
R.sup.5 are each independently hydrogen, halogen, lower alkyl, etc.,
R.sup.2 is hydrogen or an amino protective group, x is bond, -o-o,
--O--CH.sub.2--, etc., y is in which Z is bond, --O--(CH.sub.2).sub.m--
(in which m is 1 to 4), etc., R.sup.3 is lower alkanoyl, carboxy, lower
alkoxycarbonyl, etc., and R.sup.4 is hydrogen, halogen, hydroxy, phenoxy,
lower alkyl, lower alkoxy, etc., and n is 0, 1 or 2, or a salt thereof.
The compound [I] of the present invention and pharmaceutically acceptable
salts thereof are useful for the prophylactic and/or the therapeutic
treatment of pollakiurea or urinary incontinence. 1
