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