Using CCCCC(CC)Cn1c(=O)cc(Cl)[nH]c1=O, O=C([O-])[O-] to produce CCCCC(CC)Cn1c(=O)cc(Cl)n(C)c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.