Using COC(=O)CCCCCCCn1c(-c2ccccc2)c(-c2ccccc2)n(-c2ccccc2)c1=O to produce O=C(O)CCCCCCCn1c(-c2ccccc2)c(-c2ccccc2)n(-c2ccccc2)c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.