InChI=1/C20H22N4O4/c21-20(27)23-14-6-3-5-13(11-14)18(25)24-17-9-2-1-8-16(17)19(26)22-12-15-7-4-10-28-15/h1-3,5-6,8-9,11,15H,4,7,10,12H2,(H,22,26)(H,24,25)(H3,21,23,27)/t15-/m1/s1/f/h22-24H,21H2 19722D66ECD89CFB