InChI=1S/C11H20N2O5/c1-6(2)5-8(11(17)18)13-9(14)4-3-7(12)10(15)16/h6-8H,3-5,12H2,1-2H3,(H,13,14)(H,15,16)(H,17,18)/t7-,8-/m0/s1