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