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