2,2'-(((2,4-di(pyridin-2-yl)cyclobutane-1,3-diyl)bis(1H-indazole-3,6-diyl))bis(sulfanediyl))bis(N-methylbenzamide);Axitinib dimer impurity;Axitinib dimer; 2,2'-{[(2,4-Di(pyridin-2-yl)cyclobutane-1,3-diyl)bis(1H-indazole-3,6-diyl)]bis(sulfanediyl)}bis(N-methylbenzamide)