Using COC(=O)c1cn(Cc2ccccc2)c(=O)c2ccc(Br)cc12 to produce O=C(O)c1cn(Cc2ccccc2)c(=O)c2ccc(Br)cc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.