(2S,6S)-2,6-ditert-butyl-1,2,3,5,6,7-hexahydroimidazo[1,2-a]imidazol-4-ium,iodide; (2S,6S)-2,6-Di-tert-butyl-1,2,3,5,6,7-hexahydroimidazo[1,2-a]imidazol-4-ium iodide; (2S,6S)-2,6-Di-tert-butyl-2,3,5,6-tetrahydro-1H-imidazo[1,2-a]imidazole HI salt; (2S,6S)-2,6-Bis(1,1-dimethylethyl)-2,3,5,6-tetrahydro-1H-Imidazo[1,2-a]imidazole,HI salt