InChI=1S/C13H15N3O7/c14-10(17)5-7(11(18)19)15-2-1-6-3-8(12(20)21)16-9(4-6)13(22)23/h1-3,7,9,16H,4-5H2,(H2,14,17)(H,18,19)(H,20,21)(H,22,23)/b6-1-,15-2?/t7-,9-/m0/s1