InChI=1/C20H22N4O4/c1-13-17(6-4-8-19(13)24(27)28)22-20(26)12-23-10-9-16-15(11-23)5-3-7-18(16)21-14(2)25/h3-8H,9-12H2,1-2H3,(H,21,25)(H,22,26)/p+1/fC20H23N4O4/h21-23H/q+1 31DB783596879C54