InChI=1S/C18H27NO3/c1-4-5-11-16(13-20)19-18(21)22-17(14(2)3)12-15-9-7-6-8-10-15/h6-10,13-14,16-17H,4-5,11-12H2,1-3H3,(H,19,21)/t16-,17+/m0/s1