Using CCCOc1ccc(-c2nc(-c3ccc4c(c3)c(Cl)cn4CCC(=O)OCC)no2)cc1Cl to produce CCCOc1ccc(-c2nc(-c3ccc4c(c3)c(Cl)cn4CCC(=O)[O-])no2)cc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.