InChI=1S/C16H19N3O4/c20-10-6-13(18-8-10)15(21)19-14(16(22)23)5-9-7-17-12-4-2-1-3-11(9)12/h1-4,7,10,13-14,17-18,20H,5-6,8H2,(H,19,21)(H,22,23)