InChI=1S/C15H19N3O3/c1-7(19)17-9-2-3-12-10(6-9)11-4-8(15(16)21)5-13(20)14(11)18-12/h4-5,9-10,12,18,20H,2-3,6H2,1H3,(H2,16,21)(H,17,19)