InChI=1S/C28H26O9/c1-32-17-12-20(33-2)24-21(13-17)37-28(16-9-10-18-19(11-16)36-14-35-18)23(15-7-5-4-6-8-15)22(26(30)34-3)25(29)27(24,28)31/h4-13,22-23,25,29,31H,14H2,1-3H3