1,4-naphthalenedione, 5,8-dimethoxy-6-[(4-methylphenyl)sulfonyl]- 5,8-dimethoxy-6-[(4-methylphenyl)sulfonyl]naphthoquinone InChI=1/C19H16O6S/c1-11-4-6-12(7-5-11)26(22,23)16-10-15(24-2)17-13(20)8-9-14(21)18(17)19(16)25-3/h4-10H,1-3H