Envonalkib(TQ-B3139, CT-71, Formula 1) is a potent and orally active inhibitor of ALK, that exhibits IC50 values of 1.96 nM, 35.1 nM, and 61.3 nM for wild-type and mutated L1196M and G1269S-ALK. Envonalkib is also used in the research of non-small cell lung cancer.