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 serotonin agonist and belongs to the serotonin antagonist class of molecules.
user
Fc1ccc2[nH]c(C3CCN(CCCc4c[nH]c5ccc(F)cc45)CC3)cc2c1
assistant