InChI=1S/C18H28O2/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18(19)20/h3-4,6-7,10-11,14-15H,2,5,8-9,12-13,16-17H2,1H3,(H,19,20)/b4-3-,7-6-,11-10+,15-14+