InChI=1S/C19H34O2/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18-19(20)21/h6-7,9-10H,2-5,8,11-18H2,1H3,(H,20,21)/b7-6+,10-9+