Using COCC1=C(C(=O)[O-])N2C(=O)C(NC(=O)COc3ccccc3)[C@H]2SC1, CC(C)(C)C(=O)OCBr to produce COCC1=C(C(=O)OCOC(=O)C(C)(C)C)N2C(=O)C(NC(=O)COc3ccccc3)[C@H]2SC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.