InChI=1S/C17H12O11S/c1-26-16-14(20)13-10(19)5-8(18)6-12(13)27-15(16)7-2-3-9(17(21)22)11(4-7)28-29(23,24)25/h2-6,18-19H,1H3,(H,21,22)(H,23,24,25)