InChI=1/C19H21N5O2/c25-18-14-3-1-2-4-16(14)24-17(20-18)11-15(21-24)19(26)23-9-7-22(8-10-23)12-13-5-6-13/h1-4,11,13H,5-10,12H2,(H,20,25)/f/h22H 5E35C20C255D2B12