InChI=1S/C19H23NO8S/c1-20-18(27-2)16(12-6-4-3-5-7-12)15(13-8-10-14(21)11-9-13)17(19(22)23)28-29(24,25)26/h3-11,15-18,20-21H,1-2H3,(H,22,23)(H,24,25,26)