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(C)(C)OC(=O)N(c1ccc2c(c1)oc(=O)n2CC(=O)O)S(C)(=O)=O.[O-][n+]1cc(Cl)c(CC(O)c2ccc(OC(F)F)c(OCC3CC3)c2)c(Cl)c1 .
assistant