Using C[Si](C)(C)CCOC(=O)CBr, O=[N+]([O-])c1ccc(O)cc1OCc1ccccc1 to produce C[Si](C)(C)CCOC(=O)COc1ccc([N+](=O)[O-])c(OCc2ccccc2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.