InChI=1/C13H16N2O6/c16-11(17)2-1-4-14-5-3-8-6-9(12(18)19)15-10(7-8)13(20)21/h3,5-6,10,15H,1-2,4,7H2,(H,16,17)(H,18,19)(H,20,21)/b8-3-,14-5-/t10-/s2