InChI=1S/C21H24O9S/c1-6-20(3,4)15-8-13-7-14-9-18(28-16(14)10-17(13)29-19(15)23)21(5,30-12(2)22)11-27-31(24,25)26/h6-8,10,18H,1,9,11H2,2-5H3,(H,24,25,26)