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
CC1(C)CC1C(=O)O.COC(=O)NC(C(=O)N1CCCC1c1nc(-c2ccc(-c3ccc(NC(=O)c4ccc(N5CC(C)NCC5C)nc4)cc3C)c(C)c2)c[nH]1)C(C)C
assistant