| abstract |
The present invention relates to a compound of the formula [I]: wherein (a), in which -Y-, R4, R5 and R6 are4 R5each as defined in the description, etc., R1 is hydrogen, halogen, lower alkyl, hydroxy, etc., R2 is hydrogen, lower alkyl or hydroxy(lower)alkyl, R3 is hydrogen or an amino protective group, 20 R7 is hydrogen, lower alkyl, cyclo(lower)alkyl, lower R9 alkenyl, -Z-R9 or (b), in which -Z- is -0-, -S-, R9 -SO- or -SO2-, and each R9 is independently hydrogen, lower alkyl, cyclo(lower)alkyl, etc., and R8 is -D-E-R10, in which -D- is -CONHSO2- or -S02NHCO-, E is bond or lower alkylene, and R10is halogen, cyano, carboxy, etc., or a prodrug thereof 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 ulcer, overactive bladder, and the like. |