InChI=1S/C21H16O10S/c1-10-4-2-6-14-16(10)18(22)12(20(24)30-14)8-13-19(23)17-11(9-29-32(26,27)28)5-3-7-15(17)31-21(13)25/h2-7,22-23H,8-9H2,1H3,(H,26,27,28)