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: CC1(C)CC1C(=O)O.COC(=O)NC(C(=O)N1CCCC1c1nc(-c2ccc(-c3cc(F)c(NC(=O)c4ccc(N5CCNCC5C)nc4)cc3C(F)(F)F)cc2)c[nH]1)C(C)C .
assistant