InChI=1S/C15H19N3O3/c1-10(9-19)18-14(20)8-13(17-15(18)21)16-11(2)12-6-4-3-5-7-12/h3-8,10-11,16,19H,9H2,1-2H3,(H,17,21)/t10-,11-/m0/s1