<prompt> All are Atropine substitutes exceptProcyclidinePropanthelineTiotropiumDrotaverin  <response>: Drotaverine INN, also known as drotaverin is an antispasmodic drug, used to enhance cervical dilation during childbih. It is structurally related to papaverine, is a selective inhibitor of phosphodiesterase 4, and has no anticholinergic effects. Ref - medscape.com 