InChI=1S/C21H25NO9S/c1-27-16-8-5-14(11-18(16)29-3)6-10-21(23)22-13-20(31-32(24,25)26)15-7-9-17(28-2)19(12-15)30-4/h5-12,20H,13H2,1-4H3,(H,22,23)(H,24,25,26)