InChI=1S/C23H32O9/c1-2-17(31-23-20(28)18(26)19(27)21(32-23)22(29)30)14-10-9-13-16(25)12-8-6-4-3-5-7-11-15-24/h2,8,12,16-21,23-28H,1,3-7,11,15H2,(H,29,30)/b12-8-