InChI=1S/C28H22O8S/c29-21-13-20(14-22(30)15-21)27-26-19(7-6-17-4-2-1-3-5-17)12-23(31)16-25(26)35-28(27)18-8-10-24(11-9-18)36-37(32,33)34/h1-16,27-31H,(H,32,33,34)/b7-6-