SOS1-IN-1 (40 μM) and NSC-658497(30 μM) result in growth inhibitory rate of 29% and 8% respectively. The combination treatment results in growth inhibitory rate of 54%, showing the synergistic effect of SOS1-IN-1 and NSC-658497 on cell growth inhibition. It is showed that the treatment with NSC-658497 at 40 μM for 2 hours alone or in combìnation with the treatment with 40 μM of SOS1-IN-1 overnight resulted in lower expression levels of P-AKT and P-ERK. The treatment wlth 40 μM of SOS1-IN-1 overnight resulted in lower expression levels of P-ERK.