Using CC(=O)NCCC1CCc2ccc(NC(=O)CCCCc3ccccn3)c(O)c21 to produce CC(=O)NCCC1CCc2ccc3nc(CCCCc4ccccn4)oc3c21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.