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 a kras inhibitor and belongs to the cancer treatment class of molecules.
user
C=CC(=O)N1C(C)CN(c2c(C#N)c(=O)n(-c3c(C)ccnc3C(C)C)c3nc(-c4c(O)c(F)c(F)c(F)c4F)c(Cl)cc23)CC1C
assistant