InChI=1S/C18H30O3/c1-17(19)15-13-11-9-7-5-3-2-4-6-8-10-12-14-16-18(20)21/h2-3,7,9,13,15,17,19H,4-6,8,10-12,14,16H2,1H3,(H,20,21)