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 based on this description: The molecule is a kras inhibitor.
user
C=CC(=O)N1CC2CCOc3c(c4cc(F)c(-c5c(N)cccc5F)c(F)c4n(-c4c(C)ccnc4C(C)C)c3=O)N2CC1C
assistant