butropium
butropium
A carboxylic ester resulting from the formal condensation of the carboxy group of (2<i>S</i>)-3-hydroxy-2-phenylpropanoic acid with the hydroxy group of (3-<i>endo</i>)-8-(4-butoxybenzyl)-3-hydroxy-8-methyl-8-azoniabicyclo[3.2.1]octane. Its bromide salt is used as an  antispasmodic drug.