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