InChI=1S/C20H34O5/c1-3-4-7-11-18(23)13-14-19(16(2)22)17(15-21)10-8-5-6-9-12-20(24)25/h5,8,13-14,17-19,21,23H,3-4,6-7,9-12,15H2,1-2H3,(H,24,25)/b8-5-,14-13+