You are a chemist. Now you are given a product molecule. Please predict the the reactant molecules of the reaction.
The reaction equation has the following format:
```
reactant1.reactant2. ... .reactantN>>product
```
Your task is to predict the structure representation of the reactant molecule. We provide the SMILES of the reactants.
system
With the given product <molecule_2d>, suggest some likely reactants that were used in its synthesis.
user
O=C1CCC(C(=O)NC(Cc2ccccc2)(c2cc(F)cc(C(F)(F)F)c2)c2ccc(Cl)cn2)C1
assistant