Using O=C=O, C=CC(C)(C)C1C(C(C)O)C(=O)N1[Si](C)(C)C(C)(C)C to produce CC(O)C1C(=O)N([Si](C)(C)C(C)(C)C)C1C(C)(C)C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.