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 COc1ccc(CN(Cc2ccc(OC)cc2)c2nc(C)nc(-c3cc(C=O)cnc3Nc3cnc(OC)c(F)c3)n2)cc1.CC1CNCCN1C(=O)OC(C)(C)C .
assistant