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