InChI=1/C16H20N4O4/c1-20(2)6-5-17-16(21)13-7-11(18-19-13)9-22-12-3-4-14-15(8-12)24-10-23-14/h3-4,7-8H,5-6,9-10H2,1-2H3,(H,17,21)(H,18,19)/p+1/fC16H21N4O4/h17,19-20H/q+1 9432159EFD56149F