Using C[Si](C)(C)CCO, COC(=O)NC(Cc1ccc([N+](=O)[O-])c2ccccc12)C(=O)O to produce COC(=O)NC(Cc1ccc([N+](=O)[O-])c2ccccc12)C(=O)OCC[Si](C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.