InChI=1S/C27H22O15S/c28-17-5-1-15(10-19(17)30)12-23(26(33)34)40-21-7-3-14(9-20(21)31)4-8-25(32)41-24(27(35)36)13-16-2-6-18(29)22(11-16)42-43(37,38)39/h1-12,24,28-31H,13H2,(H,33,34)(H,35,36)(H,37,38,39)/b8-4+,23-12-