Using CCOC(=O)Oc1cc2occ(C=O)c(=O)c2cc1OC(=O)OCC, NS(=O)(=O)O to produce CCOC(=O)Oc1cc2occ(C(=O)O)c(=O)c2cc1OC(=O)OCC, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.