Using C=Cc1cc(C(=O)OC)c(NC(=O)OC(C)C)cc1C(F)(F)F to produce CCc1cc(C(=O)OC)c(NC(=O)OC(C)C)cc1C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.