Using COC(=O)COc1ccc2c(c1)Sc1cccc(-c3cc(=O)cc(N4CCOCC4)o3)c1S2 to produce O=C([O-])COc1ccc2c(c1)Sc1cccc(-c3cc(=O)cc(N4CCOCC4)o3)c1S2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.