Using CCCCCCCCn1cc(C=O)c2cc(-c3cccc(C)c3)ccc21, O=[Mn](=O)(=O)[O-] to produce CCCCCCCCn1cc(C(=O)O)c2cc(-c3cccc(C)c3)ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.