FLT3/HDAC-IN-1 is a dual inhibitor of FLT3/HDAC , with IC 50 values of 30.4, 52.4, and 14.7 nM for FLT3 , HDAC1 , and HDAC3 , respectively. FLT3/HDAC-IN-1 can induce apoptosis in MV-4-11 cells and has anti-proliferative effects on FLT3 mutant-transformed BaF3 cells. FLT3/HDAC-IN-1 is being researched for its potential in treating hard-to-treat solid tumors and hematological malignancies.