VVD-699 is a covalent RAS-PI3K inhibitor. VVD-699 covalently binds to cysteine 242 in the RAS binding domain of PI3K p110α, thereby blocking the ability of RAS to activate PI3K activity. VVD-699 is able to inhibit the growth of RAS-mutated and HER2-overexpressing tumors. VVD-699 can be used to study cancers associated with RAS mutations (e.g., H358 lung cancer cells, A549 cells, FaDu cells) [1].