Guanidinium trithiocarbonate betaines

Guanidinium trithiocarbonate betaines from aminoisotbiouronium salts... 

GSg added dropwise with stirring and ice-cooling to a soln. of 2- (2-aminoethyl) -1,3-dioctylisothiouronium bromide hydrobromide and coned, aq. NH3 in ethanol, stirring continued for 1 hr. N,N -dioctyl-N"- (2-mercaptoethyl) guanidinium trithiocarbonate betaine. Y 51%. F. e., also isolation of the intermediate, s. W. 0. Foye et al., J. Pharm. Sci. 54, 557 (1965). 

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