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): CN(CCCN(C)C(=O)Cc1ccc([N+](=O)[O-])cc1)C(=O)COC1Cc2ccccc2C12CCN(CCC1(c3ccc(F)cc3)CN(C(=O)c3cc(C(F)(F)F)cc(C(F)(F)F)c3)CO1)CC2 .
assistant