Using CCCc1nc2cnc3ccccc3c2n1OCc1ccccc1, O=C=NC(=O)C(Cl)(Cl)Cl to produce CCCc1nc2c(N)nc3ccccc3c2n1OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.