InChI=1/C16H17N3O4/c20-16(11-3-4-14-15(6-11)23-10-22-14)18-12-7-17-19(8-12)9-13-2-1-5-21-13/h3-4,6-8,13H,1-2,5,9-10H2,(H,18,20)/t13-/m1/s1/f/h18H 1E6D39F8692999C3