InChI=1S/C28H46O4/c1-4-6-8-9-10-11-12-13-14-15-17-23-31-27(29)25-19-21-26(22-20-25)28(30)32-24(3)18-16-7-5-2/h19-22,24H,4-18,23H2,1-3H3