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