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
To synthesis <molecule_2d>, what are the possible reactants? Write in the SMILES representation.
user
CC(C)(C)[Si](C)(C)OC(C[NH3+])c1ccc(O)c2[nH]c(=O)ccc12.COc1cc(NC(=O)CCN(C)C2CCC(OC(=O)C(O)(c3cccs3)c3cccs3)CC2)c(Cl)cc1CC=O
assistant