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
<molecule_2d> Given the product provided, propose some possible reactants that could have been employed in its formation.
user
Here are possible reactants: CCC(O)C(C)C1OC1CC(C)C=CC=C(C)C1OC(=O)CC(O[Si](CC)(CC)CC)CCC(C)(O)C(OC(C)=O)C=CC1C.O=C=Nc1ccccc1 .
assistant