InChI=1/C19H20N4O4/c1-12-3-5-15(6-4-12)22-11-14(10-18(22)24)20-19(25)21-17-8-7-16(23(26)27)9-13(17)2/h3-9,14H,10-11H2,1-2H3,(H2,20,21,25)/t14-/m0/s1/f/h20-21H 7E167224EFD2CBDF