InChI=1/C19H21N5O2/c1-12(18-22-16-6-4-5-7-17(16)23-18)20-19(26)21-14-8-10-15(11-9-14)24(3)13(2)25/h4-12H,1-3H3,(H,22,23)(H2,20,21,26)/t12-/m0/s1/f/h20-22H 597626BC35BF7A46