Using C[Si](C)(C)[N-][Si](C)(C)C, COC(=O)[C@@H]1CCCN(C(=O)OC(C)(C)C)N1C(=O)OC(C)(C)C to produce COC(=O)C1(C)CCCN(C(=O)OC(C)(C)C)N1C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.