(R)-1-((6-methylbenzo[d]oxazol-2-yl)methyl)-3-(((S)-2-phenyl-2-(piperidin-1-yl)propanoyl)oxy)quinuclidin-1-ium bromide

(R)-3-(((S)-2-phenyl-2-(piperidin-1-yl)propanoyl)oxy)-1-((5-phenylisoxazol-3-yl)methyl)quinuclidin-1-ium bromide

(R)-1-((3-phenyl-1,2,4-oxadiazol-5-yl)methyl)-3-(((S)-2-phenyl-2-(piperidin-1-yl)propanoyl)oxy)quinuclidin-1-ium bromide

(R)-3-(((S)-2-phenyl-2-(piperidin-1-yl)propanoyl)oxy)-1-(3-(pyridin-3-yl)propyl)quinuclidin-1-ium bromide