Using COC(=O)c1cccc(OC(C)(C)C(=O)OC(C)(C)C)c1 to produce CC(C)(C)OC(=O)C(C)(C)Oc1cccc(C(=O)O)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.