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