Using Cn1c(=O)[nH]c(=O)c2[nH]c(Br)nc21, O=C([O-])[O-] to produce Cn1c(Br)nc2c1c(=O)[nH]c(=O)n2C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.