InChI=1/C15H20N4O4/c1-10-8-11(17-23-10)16-12(20)9-19-13(21)15(18(2)14(19)22)6-4-3-5-7-15/h8H,3-7,9H2,1-2H3,(H,16,17,20)/f/h16H 6A2BB9AF9F1B223F