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