InChI=1S/C14H19N3O4/c15-10(6-7-12(16)18)13(19)17-11(14(20)21)8-9-4-2-1-3-5-9/h1-5,10-11H,6-8,15H2,(H2,16,18)(H,17,19)(H,20,21)/t10-,11-/m0/s1