InChI=1S/C18H19NO9S/c1-27-16-10-18(23,8-6-14(16)20)9-7-17(22)19-11-15(21)12-2-4-13(5-3-12)28-29(24,25)26/h2-10,15,21,23H,11H2,1H3,(H,19,22)(H,24,25,26)