Using COc1cc(CC(=O)O)ccc1O, Oc1c(F)c(F)c(F)c(F)c1F to produce COc1cc(CC(=O)Oc2c(F)c(F)c(F)c(F)c2F)ccc1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.