NAMPTinhibitor-linker 1, a drug-linker conjugate for ADC, integrates an NAMPTinhibitor (as a payload) with a linker. In the formulation of ADC-3, it pairs with an anti-c-Kit monoclonal antibody, demonstrating strong efficacy against c-Kit expressing cell lines, specifically GIST-T1 and NCI-H526, where it exhibits IC50 values of <3 pM and 9 pM, respectively.