InChI=1S/C19H25NO7S/c21-18(20-11-14-3-1-2-4-15(14)12-20)10-16(19(22)23)9-13-5-7-17(8-6-13)27-28(24,25)26/h5-8,14-16H,1-4,9-12H2,(H,22,23)(H,24,25,26)