Using NO, COCc1cc(Br)c(C(=O)C2CCN(C(=O)OC(C)(C)C)CC2)s1 to produce COCc1cc(Br)c(C(=NO)C2CCN(C(=O)OC(C)(C)C)CC2)s1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.