Using O=C1CCCc2c1[nH]c1c(F)cc(Cl)cc21, C[Si](C)(C)C(F)(F)F to produce OC1(C(F)(F)F)CCCc2c1[nH]c1c(F)cc(Cl)cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.