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
With the given product <molecule_2d>, suggest some likely reactants that were used in its synthesis.
user
COc1ccc(CN(c2ccccc2)c2cc(Cl)nn3c(C#N)cnc23)cc1.NC1CCCN(Cc2ccccc2)C1
assistant