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
CCC1CN(S(=O)(=O)c2cc3cc(Cl)ccc3[nH]2)CCN1C(=O)c1ncc(-c2ccccn2)cn1.O=C(OO)c1cccc(Cl)c1
assistant