InChI=1S/C14H17N3O4/c15-10(7-18)13(19)17-12(14(20)21)5-8-6-16-11-4-2-1-3-9(8)11/h1-4,6,10,12,16,18H,5,7,15H2,(H,17,19)(H,20,21)/t10-,12-/m0/s1