You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Generate a molecule that fulfills the requirement: The molecule is a kras inhibitor.
user
C=CC(=O)N1CCN(c2nc(OC3(C4CCCN4C)CC3)nc3c2CCN(c2cccc(C)c2C)C3)CC1CC#N
assistant