InChI=1/C20H20N4O4/c1-11-6-5-7-23-16(25)9-14(21-17(11)23)10-24-18(26)20(4,22-19(24)27)15-8-12(2)28-13(15)3/h5-9H,10H2,1-4H3,(H,22,27)/t20-/m0/s1/f/h22H 49FF54D3A9FA6FD1