VVD-699 is a covalent inhibitor of RAS-PI3K. It forms a covalent bond with cysteine at position 242 within the RAS-binding domain of PI3Kp110α, thereby obstructing the ability of RAS to activate PI3K. VVD-699 is capable of inhibiting the growth of tumors with RAS mutations and HER2 overexpression. It is applicable in research related to RAS mutation-associated cancers, such as those involving H358 lung cancer cells, A549 cells, and FaDu cells.