InChI=1S/C18H20O7S/c1-11-15-8-12(6-7-24-26(20,21)22)9-16(19)18(15)25-17(11)13-4-3-5-14(10-13)23-2/h3-5,8-11,17,19H,6-7H2,1-2H3,(H,20,21,22)