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.
user
C=CC(=O)N1CCN2c3nc(=O)n(-c4c(C)ccnc4C(C)C)c4c(F)c(-c5ccccc5O)c(F)c(c34)NCC2C1
assistant