InChI=1/C16H17N3O2/c1-3-11-8-13(16(20)18-10(11)2)17-9-15-19-12-6-4-5-7-14(12)21-15/h4-8,17H,3,9H2,1-2H3,(H,18,20)/f/h18H 1E5FF5C8D7D4E3AB