(2R,5R)-1,6-Diphenylhexane-2,5-diamine Dihydrochloride;2,5-Hexanediamine, 1,6-diphenyl-, hydrochloride, (2R,5R);(2R,5R)-1,6-Diphenylhexane-2,5-diamine 2HCl;(2R,5R)-1,6-Diphenyl-2,5-hexanediamine dihydrochloride