Using CC(=O)OCc1nc2cc(-c3nc4ccccc4s3)ccc2n1C1CCOCC1 to produce OCc1nc2cc(-c3nc4ccccc4s3)ccc2n1C1CCOCC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.