InChI=1S/C21H27NO9S/c1-27-16-7-5-14(11-18(16)29-3)9-10-22-21(23)20(31-32(24,25)26)13-15-6-8-17(28-2)19(12-15)30-4/h5-8,11-12,20H,9-10,13H2,1-4H3,(H,22,23)(H,24,25,26)