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 CC(C)(C)OC(=O)N1CCC(C(C(=O)O)c2ccc(F)cc2)CC1.COc1ccc2ccccc2c1CCCCN1CCNCC1 .
assistant