Using COC(=O)C1(NC(=O)OC(C)(C)C)CC1CC=O, C[Si](C)(C)[N-][Si](C)(C)C to produce C=CCC1CC1(NC(=O)OC(C)(C)C)C(=O)OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.