InChI=1S/C20H22O9S/c1-27-20-9-12-3-2-4-17(29-30(24,25)26)16(23)11-15(22)13-6-7-14(21)19(10-13)28-18(20)8-5-12/h5-10,15,17,21-22H,2-4,11H2,1H3,(H,24,25,26)