InChI=1S/C19H20O9S/c1-10(2)9-14(21)26-18-17(28-29(22,23)24)15-12(27-19(18,3)4)7-5-11-6-8-13(20)25-16(11)15/h5-8,17-18H,1,9H2,2-4H3,(H,22,23,24)