3-amino-4-ethyl-1H-1,2,4-triazole-5-thione

2-(1-thiophen-2-ylethylideneamino)guanidine

2-(2-ethylsulfanylethylsulfanyl)ethanamine

2-(benzylideneamino)guanidine

2-[(E)-1-(2-amino-4-methylpyrimidin-5-yl)ethylideneamino]guanidine,hydrochloride