Using CCOC(=O)CC(=N)N, O=C(CBr)c1ccc2ccccc2c1 to produce CCOC(=O)c1cc(-c2ccc3ccccc3c2)[nH]c1N, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.