InChI=1S/C18H19N3O2/c19-18(23)17-10-21(12-20-17)15(11-22)9-8-14-6-3-5-13-4-1-2-7-16(13)14/h1-7,10,12,15,22H,8-9,11H2,(H2,19,23)/t15-/m1/s1