Using CCOC(=O)CC1NCCc2c1[nH]c1ccc(Cl)cc21, CN=C=O to produce CN1C(=O)CC2c3[nH]c4ccc(Cl)cc4c3CCN2C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.