InChI=1S/C17H27NO3/c1-10-5-6-12-13(9-18(3)4)16(19)21-15(12)14-11(10)7-8-17(14,2)20/h12-15,20H,5-9H2,1-4H3/t12-,13-,14-,15-,17+/m0/s1