Using COC(=O)C1=CCCN(CCOC=C(c2ccccc2)c2ccccc2)C1 to produce O=C(O)C1=CCCN(CCOC=C(c2ccccc2)c2ccccc2)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.