You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I give you a description of a molecule, and you need to return one molecule in SMILES that meets the description. The description: The molecule is both a kras inhibitor and a cancer treatment.
user
O=c1nc(Cl)c2cc(F)c(Cl)nc2n1-c1ccccc(Br)cccc1
assistant