InChI=1/C20H22N4O4/c21-18(25)11-13-28-17-9-5-4-8-15(17)22-20(27)23-16-10-12-24(19(16)26)14-6-2-1-3-7-14/h1-9,16H,10-13H2,(H2,21,25)(H2,22,23,27)/t16-/m1/s1/f/h22-23H,21H2 6B6F580236DBE019