InChI=1S/C21H22O9S/c1-4-5-12-6-14-15(10-29-31(22,23)24)19(30-20(14)16(7-12)25-2)13-8-17(26-3)21-18(9-13)27-11-28-21/h4-9,15,19H,10-11H2,1-3H3,(H,22,23,24)