Using O=C(O)CSc1nnc(Br)n1-c1ccc(C2CC2)c2ccccc12 to produce O=C([O-])CSc1nnc(Br)n1-c1ccc(C2CC2)c2ccccc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.