InChI=1S/C18H21NO9S/c1-27-15-9-11(8-14(21)18(15)23)2-7-17(22)19-10-16(28-29(24,25)26)12-3-5-13(20)6-4-12/h3-6,8-9,16,20-21,23H,2,7,10H2,1H3,(H,19,22)(H,24,25,26)