Using C[Si](C)(C)CCOCCl, CC(C)(C)OC(=O)N1CCc2[nH]c3cc(Br)ccc3c2C1 to produce CC(C)(C)OC(=O)N1CCc2c(c3ccc(Br)cc3n2COCC[Si](C)(C)C)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.