Compounds of Formula I:, pharmaceutically acceptable salts thereof, deuterated derivatives of any of the foregoing, and metabolites of any of the foregoing are disclosed. Pharmaceutical compositions comprising the same, methods of treating cystic fibrosis using the same, and methods for making the same are also disclosed.本發明揭示式I之化合物:, 其醫藥學上可接受之鹽、前述任一者之氘化衍生物及前述任一者之代謝物。本發明亦揭示包含其之醫藥組合物、使用其治療囊腫纖化症之方法及其製備方法。