InChI=1S/C22H18O15S/c23-13-5-1-11(9-15(13)25)3-7-17(26)35-19(21(28)29)20(22(30)31)36-18(27)8-4-12-2-6-14(24)16(10-12)37-38(32,33)34/h1-10,19-20,23-25H,(H,28,29)(H,30,31)(H,32,33,34)/b7-3+,8-4+