Using COC(=O)CCCBr, CC(C)(C)OC(=O)Cn1c(=O)[nH]c2c([N+](=O)[O-])cccc21 to produce COC(=O)CCCn1c(=O)n(CC(=O)OC(C)(C)C)c2cccc([N+](=O)[O-])c21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.