Using COc1cc(Br)ccc1N1[Si](C)(C)CC[Si]1(C)C, CC(C)(C)OC(=O)N1CCC(=O)CC1 to produce COc1cc(C2(O)CCN(C(=O)OC(C)(C)C)CC2)ccc1N, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.