The Activity of 10‐AminoaeyIphenothiazines, Basically Substituted Derivatives of Phenothiazinc‐10‐carboxylie Acid, Atropine. Papaverine and Some Other Spasmolytic Drugs against Barium‐and Acetylcholine‐Induccd Spasms of Guinea‐Pig and Bat Ileum.