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
With the given product <molecule_2d>, suggest some likely reactants that were used in its synthesis.
user
CCN(c1cc(-c2ccc(N3CCC(NC(=O)OC(C)(C)C)CC3)nc2)cc(C(=O)NCc2c(C(C)C)cc(C)[nH]c2=O)c1C)C1CCOCC1
assistant