InChI=1S/C14H16N2O9/c1-6(17)22-10-11(23-7(2)18)13(24-8(3)19)25-12(10)16-5-4-9(20)15-14(16)21/h4-5,10-13H,1-3H3,(H,15,20,21)/t10-,11+,12-,13+/m1/s1