Synonyms: 2,3,5,6-Tetrahydro-N-(imino(2,3,5,6-tetrahydro-1H-imidazo(1,2-a)imidazol-1-yl)methyl)-1H-imidazo(1,2-a)imidazole-1-carboxamidine monosulphate;N'-[(E)-2,3,5,6-tetrahydro-1H-imidazo[1,2-a]imidazol-1-ylmethylidene]-2,3,5,6-tetrahydro-1H-imidazo[1,2-a]imidazole-1-carbohydrazonamide sulfate (1:1)