InChI=1S/C18H31NO4/c1-4-6-7-8-14-13(9-10-15(14)20)11-16(21)19-17(18(22)23)12(3)5-2/h12-14,17H,4-11H2,1-3H3,(H,19,21)(H,22,23)/t12-,13-,14-,17+/m1/s1