Using O=C(OC(Cl)(Cl)Cl)OC(Cl)(Cl)Cl, CCCCCCCCCCCCCCOc1ccc(N)cc1 to produce CCCCCCCCCCCCCCOc1ccc(N=C=O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.