The invention relates to novel compounds having the general formula (I), and which compounds are useful to treat a disorder or disease characterized by bronchoconstriction, e.g. COPD and asthma.
[Problem]
A compound which is useful as an active ingredient of a pharmaceutical composition for treating storage dysfunctions, voiding dysfunctions, and lower urinary tract diseases is provided.
[Means for Solution]
The present inventors have found that a thiazole derivative having pyrazine-2-carbonylamino substituted at the 2-position is an excellent muscarinic M
3
receptor positive allosteric modulator, and is useful as an agent for preventing and/or treating bladder or urinary tract diseases, related to bladder contraction by a muscarinic M
3
receptor, thereby completing the present invention. The 2-acylaminothiazole derivative or a salt thereof of the present invention can be used as an agent for preventing and/or treating bladder or urinary tract diseases, related to bladder contraction by a muscarinic M
3
receptor, for example, voiding dysfunctions such as underactive bladder.