Using COCCl, O=C1CN2CCOC2(c2ccccc2Cl)c2cc(Cl)ccc2N1 to produce COCN1C(=O)CN2CCOC2(c2ccccc2Cl)c2cc(Cl)ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.