| 摘要 |
The present invention relates to a compound formula [I]: wherein R<1 >is hydrogen or halogen, R<2 >is hydrogen or an amino protective group, R<3 >is hydrogen or lower alkyl, X is bond, -CH2- or -O-, and Y is in which R<4 >is lower alkoxycarbonyl, in which R<5 >is carboxy(lower)alkyl, etc., in which R<6 >is hydroxy, etc., and so on, 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.
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