InChI=1S/C16H10O11S/c17-7-4-9(18)12-11(5-7)26-15(14(20)13(12)19)6-1-2-8(16(21)22)10(3-6)27-28(23,24)25/h1-5,17-18,20H,(H,21,22)(H,23,24,25)