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: CC(=O)Oc1ccc(C(ON=C(C(=O)O)c2csc(N)n2)C(=O)OC(c2ccccc2)c2ccccc2)cc1OC(C)=O.COc1ccc(COC(=O)C2=C(CCl)CSC3C(N)C(=O)N23)cc1 .
assistant