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
Do retrosynthesis with the product <molecule_2d> .
user
OK. The reactants may be C=O.O=C(NCC(=O)N1CCC(NC2CCC(O)(c3ccc(-c4ncco4)cn3)CC2)C1)c1cccc(C(F)(F)F)c1 .
assistant