InChI=1S/C19H16O8S/c1-11(20)10-15(12-6-8-13(9-7-12)27-28(23,24)25)17-18(21)14-4-2-3-5-16(14)26-19(17)22/h2-9,15,22H,10H2,1H3,(H,23,24,25)/t15-/m1/s1