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
<molecule_2d> Given the product provided, propose some possible reactants that could have been employed in its formation.
user
Here are possible reactants: CNCCCN(C)C(=O)COC1Cc2ccccc2C12CCN(CCC1(c3ccc(F)cc3)CN(C(=O)c3cc(C(F)(F)F)cc(C(F)(F)F)c3)CO1)CC2.O=Cc1cccc(C(=O)O)c1 .
assistant