InChI=1S/C19H11NO8S/c21-17-15-9-4-2-1-3-8(9)14-13-10(5-11-18(14)27-7-26-11)12(28-29(23,24)25)6-20(16(13)15)19(17)22/h1-5,12H,6-7H2,(H,23,24,25)