Using COC(=O)CC(=O)OC, Cn1c(=O)oc(=O)c2ccc(Br)cc21 to produce COC(=O)c1c(O)c2ccc(Br)cc2n(C)c1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.