InChI=1/C16H20N4O4/c1-8(14(21)20-16(23)18-10-3-4-10)17-11-5-6-13-12(7-11)19-15(22)9(2)24-13/h5-10,17H,3-4H2,1-2H3,(H,19,22)(H2,18,20,21,23)/t8-,9-/m1/s1/f/h18-20H 836C687726BF57CE