The application discloses a
small molecule degrading agent of
aryl formamides and application thereof, and has a structure shown in general formula I or a pharmaceutically acceptable salt, an isotopically labeled compound thereof. The compound of the application has a targeted degradation activity on MYC
protein, and has a significant proliferation inhibiting activity on various
solid tumor cells such as
neuroblastoma and
rhabdomyosarcoma. The compound of the application can be used for preparing a degrading agent targeting MYC
protein, and can also be used for preparing a
drug for treating diseases related to MYC
gene amplification, fusion,
mutation, expression imbalance,
conformational change and function
abnormality.