2-((4-((7-chloroquinolin-4-yl)(2-((4-((7-chloroquinolin-4-yl)amino)pentyl)(ethyl)amino)ethyl)amino)pentyl)(ethyl)amino)ethan-1-ol dihydrochloride,2-((4-((7-chloroquinolin-4-yl)(2-((4-((7-chloroquinolin-4-yl)amino)pentyl)(ethyl)amino)ethyl)amino)pentyl)(ethyl)amino)ethan-1-ol dihydrochloride,Chloroquine Impurity