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
Given the following product, please provide possible reactants. <molecule_2d>
user
Possible reactant(s): COc1ccc(Cn2cc(-c3cn(S(=O)(=O)c4ccc(C)cc4)c4ncc(-c5cccc(NS(C)(=O)=O)c5)cc34)cn2)cc1 .
assistant