has role is deprotonated form of has functional parent ethylamine cysteamine 2-aminoethanethiol 2-Aminoethanethiol An amine that consists of an ethane skeleton substituted with a thiol group at C-1 and an amino group at C-2. CHEBI:17141 geroprotector amine alkanethiol cysteaminium anti-HIV agent ophthalmology drug radiation protective agent mouse metabolite human metabolite