InChI=1/C20H22N4O4/c1-9-5-6-10(2)11(7-9)15-12(8-21-23-15)16-13-14(17(22-16)20(27)28-4)19(26)24(3)18(13)25/h5-8,13-14,16-17,22H,1-4H3,(H,21,23)/t13-,14+,16-,17-/m1/s1/f/h21H CD657121B463F90B