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