Using CCOC(=O)c1ccc(-c2ccc(C)cc2)c(-c2ccccc2)n1 to produce COC(=O)c1ccc(-c2ccc(C)cc2)c(-c2ccccc2)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.