InChI=1S/C14H20N2O5/c1-21-12-7-9(6-11(18)14(12)20)2-3-13(19)16-8-10(17)4-5-15/h2-3,6-7,10,17-18,20H,4-5,8,15H2,1H3,(H,16,19)