InChI=1S/C12H20O9S2/c1-11(18)3-23-12(19,4-22-11)2-20-10-7(15)5(13)6(14)8(21-10)9(16)17/h5-8,10,13-15,18-19H,2-4H2,1H3,(H,16,17)