InChI=1S/C19H20O7S/c1-10-14-8-12(19-11(2)24-19)4-6-15(14)25-18(10)13-5-7-16(17(9-13)23-3)26-27(20,21)22/h4-11,18-19H,1-3H3,(H,20,21,22)