Using COC(=O)c1ccc(CC2CCc3c(cccc3-c3cccc(C(F)(F)F)c3)C2=O)cc1 to produce O=C(O)c1ccc(CC2CCc3c(cccc3-c3cccc(C(F)(F)F)c3)C2=O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.