InChI=1/C18H18N4O4/c1-12-6-8-14(9-7-12)21-11-13(10-17(21)23)19-18(24)20-15-4-2-3-5-16(15)22(25)26/h2-9,13H,10-11H2,1H3,(H2,19,20,24)/t13-/m1/s1/f/h19-20H BF281696974005F4