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=C(C)C(=O)Cl.CC(C)c1cccc(C(C)C)c1N1C(=O)c2ccc3c4cccc5c(C#CCCCCO)ccc(c6ccc(c2c36)C1=O)c54 .
assistant