S1C=CC(CS[CH2:8][CH2:9][NH:10][C:11](=[NH:14])SC)=N1.[NH2:15][CH2:16][CH2:17][S:18][CH2:19][C:20]1[CH:24]=[CH:23][S:22][N:21]=1.[CH2:25]([NH2:27])C>>[C:25]([NH:14][C:11]([NH:10][CH2:9][CH3:8])=[N:15][CH2:16][CH2:17][S:18][CH2:19][C:20]1[CH:24]=[CH:23][S:22][N:21]=1)#[N:27]Reaction N-cyano-N'-[2-(3-isothiazolylmethylthio)ethyl-S-methylisothiourea, prepared from 3-[(2-aminoethyl)thiomethyl]isothiazole by the procedure of Example 3(c)(i), wth ethylamine by the procedure of Example 4 gives N-cyano-N'-ethyl-N"-[2-(3-isothiazolylmethylthio)ethyl]guanidine.
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