InChI=1S/C21H22O8S/c1-21(2)9-8-15-16(28-21)6-4-12-10-13(11-27-19(12)15)14-5-7-17(26-3)20(18(14)22)29-30(23,24)25/h4-9,13,22H,10-11H2,1-3H3,(H,23,24,25)