Using COC(=O)c1ccc(OC2CCN(C(=O)OC(C)(C)C)C2)cc1OC to produce COc1cc(OC2CCN(C(=O)OC(C)(C)C)C2)ccc1C(=O)O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.