Using COc1cc(OC)nc(C2(O)OC(=O)c3c(-c4ccc(Cl)cc4)ccnc32)n1 to produce COc1cc(OC)nc(C(=O)c2nccc(-c3ccc(Cl)cc3)c2C(=O)[O-])n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.