InChI=1S/C19H16O10S/c1-24-8-4-3-5-9-13(8)17(20)16-10(25-2)6-11-14(18(16)27-9)15-12(29-30(21,22)23)7-26-19(15)28-11/h3-6,12,15,19H,7H2,1-2H3,(H,21,22,23)