InChI=1/C20H19N3O6/c24-18(25)15(9-12-10-22-14-4-2-1-3-13(12)14)21-6-5-11-7-16(19(26)27)23-17(8-11)20(28)29/h1-7,10,15,17,22-23H,8-9H2,(H,24,25)(H,26,27)(H,28,29)/b11-5-,21-6-/t15-,17-/s2