Using C[Si](C)(C)OCCBr, COC(=O)c1ccc(CN(c2nc3ccccc3[nH]2)C2CCC(C(C)(C)C)CC2)cc1 to produce COC(=O)c1ccc(CN(c2nc3ccccc3n2CCO[Si](C)(C)C)C2CCC(C(C)(C)C)CC2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.