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