The molecule is a 4-(diethylamino)but-2-yn-1-ol yhat has S configuration. In contrast to the (R)- enantiomer, esoxybutynin exhibits essentially no anticholinergic activity. It has a role as a muscarinic antagonist, a local anaesthetic and a calcium channel blocker. It is an enantiomer of a (R)-oxybutynin.
4-(diethylamino)but-2-ynyl (2S)-2-cyclohexyl-2-hydroxy-2-phenylacetate