InChI=1S/C18H30O3/c19-17-15-13-11-9-7-5-3-1-2-4-6-8-10-12-14-16-18(20)21/h1-2,5-8,19H,3-4,9-17H2,(H,20,21)/b2-1-,7-5-,8-6-