Using CCCc1c2nc(C(=O)OC)cc(Cl)c2cc2c(=O)cc(C(=O)OCC)oc12 to produce CCCc1c2nc(C(=O)O)cc(Cl)c2cc2c(=O)cc(C(=O)O)oc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.