InChI=1S/C19H13NO9S/c21-17(19(22)23)15-9-4-2-1-3-8(9)14-13-10(5-11-18(14)28-7-27-11)12(6-20-16(13)15)29-30(24,25)26/h1-5,12,20H,6-7H2,(H,22,23)(H,24,25,26)