Using O=C(NCCc1c[nH]c2ccc(Cl)cc12)c1cc(CCl)on1, CCN to produce CCNCc1cc(C(=O)NCCc2c[nH]c3ccc(Cl)cc23)no1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.