Using CCOC(=O)CCC(=O)OCC, COC(=O)c1ccc(F)cc1C(=O)OC to produce CCOC(=O)c1c(C(=O)OCC)c(O)c2cc(F)ccc2c1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.