You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Build a molecule that meets the requirement: The molecule is a kras g12c inhibitor and is cancer treatment.
user
C=CC(=O)N1CCN(c2nc(=O)n3c4c(c(-c5c(F)cccc5F)c(C(F)(F)F)cc24)SCC3COC)CC1
assistant