2413212-09-4

Desfluoro-N-des(4-dimethylamino-2-en-1-oxo)butyl Afatinib is an impurity of Afatinib (A355300); an aminocrotonylamino-substituted quinazoline derivative used for treating cancer and diseases of the respiratory tract, lungs, gastrointestinal tract, bile duct, and gallbladder.