InChI=1S/C17H12O11S/c1-23-5-3-6-11(12-14-17(26-14)27-16(12)24-6)13-10(5)9-7(28-29(20,21)22)2-4(18)8(9)15(19)25-13/h3,7,12,14,16-17H,2H2,1H3,(H,20,21,22)