InChI=1S/C17H14O11S/c1-26-17-14(22)12-10(20)4-8(19)5-11(12)27-16(17)9-3-2-7(6-18)15(13(9)21)28-29(23,24)25/h2-5,18-21H,6H2,1H3,(H,23,24,25)