Using O=C(CBr)OCc1ccccc1, CCOC(=O)C(NC(=O)OC(C)(C)C)C(=O)OCC to produce CCOC(=O)C(CC(=O)OCc1ccccc1)(NC(=O)OC(C)(C)C)C(=O)OCC, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.