InChI=1S/C20H34O3/c21-19-17-15-13-11-9-7-5-3-1-2-4-6-8-10-12-14-16-18-20(22)23/h8,10,12,14,16,18,21H,1-7,9,11,13,15,17,19H2,(H,22,23)