Using CC(=O)c1ccc2c(ccc3c2c2cccc4c(=O)n(CCN(C)C)c(=O)n3c42)c1 to produce CC(O)c1ccc2c(ccc3c2c2cccc4c(=O)n(CCN(C)C)c(=O)n3c42)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.