Using COC(=O)Cc1cccc(OCCCNCC(c2ccccc2)c2ccccc2)c1 to produce O=C(O)Cc1cccc(OCCCNCC(c2ccccc2)c2ccccc2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.