RG14620 (Tyrphostin RG14620) is an epidermal growth factor receptor (EGFR) inhibitor.

EGFR:3 μM.

RG14620 is dissolved in 100% DMSO and diluted with the culture medium before addition to the cells. MH-85 and HER 14 cells are cultured in the medium in the presence or absence of increasing concentrations of RG-13022 or RG-14620 for 10 days. At the end of culture, the cells are fixed with 4% (v/v) formaldehyde in calcium-magnesium-free phosphate-buffered saline for 15 min at room temperature and stained with hematoxylin. Numbers of colonies including more than 20 cells in each well are counted under the microscope[1].