InChI=1S/C18H28O3/c1-2-14-17(19)15-12-10-8-6-4-3-5-7-9-11-13-16-18(20)21/h8,10,12,15,17,19H,2-3,5,7,9,11,13-14,16H2,1H3,(H,20,21)/b10-8-,15-12+