1981 年 101 巻 2 号 p. 174-181
Pharmacological properties of 3-(di-2-thienylmethylene)-5-methyl-trans-quinolizidinium bromide (HSR-902), 2-(di-2-thienylmethylene)-5-methyl-trans-quinolizidinium bromide (HSR-911), 3-diphenylmethylene-5-methyl-trans-quinolizidinium bromide (HSR-405) and 2-diphenylmethylene-5-methyl-trans-quinolizidinium bromide (HSR-402), new antispasmodic agents, were compared with those of atropine and butylscopolamine bromide, and the following results were obtained. These antispasmodic agents shifted the dose-response curve of acetylcholine chloride (ACh) in parallel to the right without decreasing the maximal response in isolated guinea pig ileum, and the plots of Schild were found to be linear. The order of potency to antagonize the spontaneous motility of guinea pig ileum was as follows : HSR-911≒atropine>HSR-402>HSR-902»HSR-405> butylscopolamine bromide. The order of potency to antagonize the contraction of rat stomach induced by vagus nerve stimulation was as follows : HSR-911>HSR-402>HSR-902»HSR-405>atropine»butylscopolamine bromide. The order of potency to mydriatic activity of rat or mouse was as follows : atropine>HSR-911≒HSR-402»HSR-405>HSR-902>butylscopolamine bromide. The order of potency to inhibit pilocarpine induced salivation of guinea pig or mouse was as follows : atropine»HSR-911>HSR-402>HSR-902>HSR-405>butylscopolamine bromide. These results indicated that antagonisms of these antispasmodic agents against ACh were competitive, and the selectivity to antispasmodic activity of HSR-902 might be the highest among these antispasmodic agents including atropine and butylscopolamine bromide.