Using CC(C)(C)OC(=O)CBr, CCOC(=O)C1(C(C)(C)O[SiH2]C(C)(C)C)CCNC1 to produce CCOC(=O)C1(C(C)(C)O[SiH2]C(C)(C)C)CCN(CC(=O)OC(C)(C)C)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.