Using CC(C)(C)[Si](C)(C)c1c(F)c(F)nc(Br)c1F, O=Cc1c(Cl)ncnc1Cl to produce CC(C)(C)[Si](C)(C)c1c(F)c(F)nc(C(O)c2c(Cl)ncnc2Cl)c1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.