InChI=1S/C14H17N3O3/c1-8(15)13(18)17-12(14(19)20)7-10-6-9-4-2-3-5-11(9)16-10/h2-6,8,12,16H,7,15H2,1H3,(H,17,18)(H,19,20)/t8-,12-/m0/s1