Using O=C1CNC(=O)O1, C=COCCNc1ccc(Cl)cc1C(=O)c1ccccc1 to produce C=COCCN1C(=O)CN=C(c2ccccc2)c2cc(Cl)ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.