InChI=1/C16H15N3O2/c1-10-7-14(11(2)21-10)16(20)19-18-9-12-8-17-15-6-4-3-5-13(12)15/h3-9,17H,1-2H3,(H,19,20)/b18-9+/f/h19H 3BD39641C3FAD7D2