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(COC(=O)C2=C(CCl)CSC3C(N)C(=O)N23)cc1.O=C(O)C(=NOC(C(=O)OC(c1ccccc1)c1ccccc1)c1ccc(O)c(O)c1)c1csc(NC(c2ccccc2)(c2ccccc2)c2ccccc2)n1 .
assistant