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 COC(=O)CC(c1cccc(OCc2cc(OCC(C)C)c(-c3cc(OC)ccc3F)nc2OC)c1)C1CC1 .
assistant