InChI=1S/C28H50O4/c1-3-5-7-9-13-17-21-25-31-27(29)23-19-15-11-12-16-20-24-28(30)32-26-22-18-14-10-8-6-4-2/h13-14,17-18H,3-12,15-16,19-26H2,1-2H3/b17-13-,18-14-