abstract |
[Problem] n The abject of the present invention is to provide a novel compound having β2 adrenergic receptor agonist activity and muscarinic receptor antagonist activity. n [Means for Salving the Problem n The present invention is a quaternary ammonium salt compounds represented by formula (I), or a pharmaceutically acceptable salt thereof, with superior β2 adrenergic receptor agonist activity and muscarinic receptor antagonist activity. |