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