Using O=C1CC(=O)N(c2ccc(NC(=O)c3cccnc3Cl)cc2)c2ccc3cnccc3c2N1 to produce O=C1CC(=O)N(c2ccc(NC(=O)c3cccnc3Cl)cc2)c2ccc3c(c2N1)CCNC3, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.