InChI=1S/C14H18N2O7/c17-5-1-2-9(12(18)19)15-4-3-8-6-10(13(20)21)16-11(7-8)14(22)23/h3-4,6,9,11,16-17H,1-2,5,7H2,(H,18,19)(H,20,21)(H,22,23)/b8-3-,15-4-/t9-,11+/m0/s1