Using CN, COC(=O)c1c([N+](=O)[O-])ccc(O[Si](C)(C)C(C)(C)C)c1CBr to produce CN1Cc2c(O)ccc([N+](=O)[O-])c2C1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.