Using CCOC(=O)CCCCCOc1cc(-c2ccccc2)cc(-c2ccccc2)n1 to produce O=C(O)CCCCCOc1cc(-c2ccccc2)cc(-c2ccccc2)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.