InChI=1S/C19H20O9S/c1-5-10(2)18(21)27-19(3,4)17-16(28-29(22,23)24)14-12(25-17)8-6-11-7-9-13(20)26-15(11)14/h5-9,16-17H,1-4H3,(H,22,23,24)