InChI=1/C18H19N3O3/c22-16-18(9-5-2-6-10-18)19-17(23)21(16)12-14-11-15(24-20-14)13-7-3-1-4-8-13/h1,3-4,7-8,11H,2,5-6,9-10,12H2,(H,19,23)/f/h19H 503BB536DDEE8C9B