Using CC(=O)c1cc(F)c(F)c(F)c1, CCOC(=O)C(=O)OCC to produce CCOC(=O)C(=O)CC(=O)c1cc(F)c(F)c(F)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.