Using Fc1c(F)c(F)c(Br)c(F)c1F, CCO[Si](OCC)(OCC)OCC to produce CCO[Si](OCC)(c1c(F)c(F)c(F)c(F)c1F)c1c(F)c(F)c(F)c(F)c1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.