Rezivertinib analogue 1 is a process impurity of osimertinib mesylate. Rezivertinib analogue 1 can be used in the study of non-small cell lung cancer[1].
[1]. Huijuan Jia, et al. The methanesulfonic acid uncommon preparation method for Buddhist nun's process contaminants difficult to understand. Patent CN108017620A.
















