Using O=C(O)c1c(C2CCCCC2)cc(C2CCCCC2)cc1C1CCCCC1 to produce O=C([O-])c1c(C2CCCCC2)cc(C2CCCCC2)cc1C1CCCCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.