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)N1CCN(c2nc(OCCCN3CCOCC3)nc3c2CCC(N2CCCc4ccccc42)C3)CC1CC#N
assistant