... (Pharmaceutical Institute, Keio—Gz'juku University“) The fourteen compounds of 3—(substituted amino)propylguanidine were synthesized by reacting S—methylisothiourea sulfate with 3—(substituted ... ' 2) M. Furukawa, S. Toyoshima, T. Ueda: This Bulletin, 11, 1247 ... 232 Vol. ...