Using C[Si](C)(C)CCOCn1cc(C(=O)O)c2nc(Br)cnc21, CC(C)(C)N to produce CC(C)(C)NC(=O)c1cn(COCC[Si](C)(C)C)c2ncc(Br)nc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.