EGFR/DHFR-IN-2 (9b) is a dual h-DHFR/EGFRTK inhibitor, with IC50 values of 0.192 µM and 0.109 µM for h-DHFR and EGFR, respectively. EGFR/DHFR-IN-2 (9b) halts the cell cycle at the G1/S phase and induces apoptosis. EGFR/DHFR-IN-2 (9b) is a potential inhibitor of CYP2C9 and CYP3A4. EGFR/DHFR-IN-2 (9b) can be used in the cancer research[1].