InChI=1/C21H22N4O/c1-21(2,3)20-23-13-17(14-24-20)19(26)25-18(15-8-5-4-6-9-15)16-10-7-11-22-12-16/h4-14,18H,1-3H3,(H,25,26)/t18-/m1/s1/f/h25H 4DE18D1930629AD5