InChI=1S/C18H31NO5/c1-5-12(2)16(20)24-13(3)18(4,22)17(21)23-11-14-8-10-19-9-6-7-15(14)19/h12-15,22H,5-11H2,1-4H3/t12?,13?,14-,15-,18?/m1/s1