Using CC=O, CC(C)(C)OC(=O)Nc1ccc(NC(=O)OC(C)(C)C)c(Br)c1 to produce CC(O)c1cc(NC(=O)OC(C)(C)C)ccc1NC(=O)OC(C)(C)C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.