Using CCOC(=O)CCc1c(C(=O)OCC)[nH]c2cc(I)cc(I)c12 to produce O=C(O)CCc1c(C(=O)O)[nH]c2cc(I)cc(I)c12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.