InChI=1/C18H27NO2/c1-7-8-19-16(20)12-9-13(17(2,3)4)15-14(10-12)18(5,6)11-21-15/h9-10H,7-8,11H2,1-6H3,(H,19,20)/f/h19H 18ACA95E22F6E09F