You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I need a molecule that meets the following conditions: It belongs to the anti emetic class of molecules. Please represent the molecule in SMILES.
user
O=C(O)CCCCN1CCN(C(COCc2cc(C(F)(F)F)cc(C(F)(F)F)c2)c2ccccc2)CC1
assistant