Using C#Cc1ccc2c(c1)C(n1ccccc1=O)=CC(C)(C)C2=O to produce CCc1ccc2c(c1)C(n1ccccc1=O)=CC(C)(C)C2=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.