Using CC1(C2CCCC2)Cc2cc(OCC(=O)O)c(Cl)c(Cl)c2C1=NO to produce CC1(C2CCCC2)Cc2cc(OCC(=O)[O-])c(Cl)c(Cl)c2C1=NO, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.