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): CCOc1cc(OC(C)C)c(F)c(C(Nc2ccc(-c3noc(C)n3)cc2)c2nc(-c3ccccc3C(C)=O)cn2C(c2ccccc2)(c2ccccc2)c2ccccc2)c1 .
assistant