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