Using COC(=O)c1cc(-c2cc(C(=O)OC)nc(C(=O)OC)c2)cc(C(=O)OC)n1 to produce OCc1cc(-c2cc(CO)nc(CO)c2)cc(CO)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.