InChI=1/C18H20N4O4/c1-26-9-8-22-17(24)13(16(23)21-18(22)25)15-14-11(6-7-19-15)10-4-2-3-5-12(10)20-14/h2-5,14-15,19,23H,6-9H2,1H3,(H,21,25)/t14-,15-/m0/s1/f/h23h,20-21H 941BB9122D5925A0