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: It belongs to the anti emetic class of molecules.
user
O=C(O)C1CN2CCC1C(OCc1cc(C(F)(F)F)cc(C(F)(F)F)c1)C2C(c1ccccc1)c1ccccc1
assistant