Using COc1cc(O)ccc1C(C)(C)C, CC(C)(C)OC(=O)CBr to produce COc1cc(OCC(=O)OC(C)(C)C)ccc1C(C)(C)C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.