InChI=1/C20H20N2O4S/c23-19(6-4-15-3-5-16-17(14-15)26-12-11-25-16)21-7-9-22(10-8-21)20(24)18-2-1-13-27-18/h1-6,13-14H,7-12H2/b6-4+ F0DCB5847D5C1C1B