Using NCc1cccc(Br)c1, O=C(OCC1c2ccccc2-c2ccccc21)C1CC(=O)N(O)C1=O to produce O=C(NCc1cccc(Br)c1)OCC1c2ccccc2-c2ccccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.