Using O=C1CCC(=O)N1Br, COC(=O)c1ncc2nc(-c3ccccc3)oc2c1O to produce COC(=O)c1nc(Br)c2nc(-c3ccccc3)oc2c1O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.