InChI=1/C18H20N4O4/c1-22-11-12(10-20-22)9-19-16(23)17(24)21-13-4-5-14-15(8-13)26-18(25-14)6-2-3-7-18/h4-5,8,10-11H,2-3,6-7,9H2,1H3,(H,19,23)(H,21,24)/f/h19,21H 37DED60A5FA42542