InChI=1S/C28H54O4/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18-19-20-21-22-23-24-28(31)32-26-27(30)25-29/h16-17,27,29-30H,2-15,18-26H2,1H3/b17-16-/t27-/m1/s1