InChI=1S/C20H31NO2/c1-19-10-8-14(22)12-13(19)4-5-15-16-6-7-18(21-23-3)20(16,2)11-9-17(15)19/h13,15-17H,4-12H2,1-3H3/t13-,15?,16?,17?,19-,20-/m1/s1