InChI=1/C20H20N4O4/c1-11-7-8-15-16(9-11)19(27)24(18(15)26)12(2)17(25)22-13-5-4-6-14(10-13)23-20(28)21-3/h4-10,12H,1-3H3,(H,22,25)(H2,21,23,28)/t12-/m1/s1/f/h21-23H DE0CE9D7B378B698