Using O=C1C=C2C(CC(O)CN2Cc2ccc(Cl)nc2)O1, ClC(Cl)(Cl)Cl to produce O=C1C=C2C(CC(Cl)CN2Cc2ccc(Cl)nc2)O1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.