Using N=C(COCCc1ccc2ccccc2c1)NC(=O)c1cc(Cl)cnc1Cl to produce O=c1[nH]c(COCCc2ccc3ccccc3c2)nc2ncc(Cl)cc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.