InChI=1S/C28H46O9/c1-2-3-4-15-18-21(36-28-25(33)23(31)24(32)26(37-28)27(34)35)19-16-13-11-9-7-5-6-8-10-12-14-17-20-22(29)30/h3-4,13,15-16,18,21,23-26,28,31-33H,2,5-12,14,17,19-20H2,1H3,(H,29,30)(H,34,35)/b4-3-,16-13-,18-15?