Using COC1(c2ccc(/C=C/C[C@H](NC(=O)c3c(Cl)cccc3Cl)C(=O)O)cc2)CCOCC1 to produce COC1(c2ccc(/C=C/C[C@H](NC(=O)c3c(Cl)cccc3Cl)C(=O)[O-])cc2)CCOCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.