Using CCOC(=O)CC(=O)c1cc(O)cc2nc(CCc3ccccc3)[nH]c12 to produce OCCC(O)c1cc(O)cc2nc(CCc3ccccc3)[nH]c12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.