Using O=C(Cl)c1cnc2cccnc2c1O, NC(C(=O)O)c1ccc(O)cc1 to produce O=C(NC(C(=O)O)c1ccc(O)cc1)c1cnc2cccnc2c1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.