InChI=1S/C17H12O10S/c1-23-8-5-9-11(6-2-3-24-17(6)25-9)15-14(8)13-10(27-28(20,21)22)4-7(18)12(13)16(19)26-15/h2-3,5-6,10,17H,4H2,1H3,(H,20,21,22)