InChI=1S/C28H56O4/c1-3-26(2)22-20-18-16-14-12-10-8-6-4-5-7-9-11-13-15-17-19-21-23-28(31)32-25-27(30)24-29/h26-27,29-30H,3-25H2,1-2H3/t26?,27-/m1/s1