(E)-N,N-dimethyl-1-(5-(((2-((1-(methylamino)-2-nitrovinyl)amino)ethyl)thio)methyl)furan-2-yl)methanamine oxide,(E)-N,N-dimethyl-1-(5-(((2-((1-(methylamino)-2-nitrovinyl)amino)ethyl)thio)methyl)furan-2-yl)methanamine oxide,Impurity in commercial preparations of Ranitidine.,Ranitidine Impurity