Using C[Si](C)(C)CCOCCl, O=c1[nH]ccc2c(Nc3c(Cl)cc(F)cc3Cl)nc3ccc(Br)cc3c12 to produce C[Si](C)(C)CCOCN(c1c(Cl)cc(F)cc1Cl)c1nc2ccc(Br)cc2c2c(=O)n(COCC[Si](C)(C)C)ccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.