Cap-dependent endonuclease-IN-25 is a potent inhibitor of cap-dependent endonuclease ( CEN ). Cap-dependent endonuclease-IN-25 is a macrocyclic pyridotriazine derivative. Cap-dependent endonuclease-IN-25 has the potential for the research of viral infections caused by viruses belonging to the Orthomyxoviridae family (extracted from patent WO2020075080A1, compound 4).