InChI=1S/C18H30O3/c1-17(2)13-11-9-7-5-3-4-6-8-10-12-14-21-16-18(20)15-19/h4,6,12,14,17-20H,3,5,7,9,11,13,15-16H2,1-2H3/b6-4-,14-12-/t18-/m0/s1