InChI=1/C16H15N3O4/c1-8-3-5-11(15(21)17-8)16(22)18-10-4-6-13-12(7-10)19-14(20)9(2)23-13/h3-7,9H,1-2H3,(H,17,21)(H,18,22)(H,19,20)/t9-/m1/s1/f/h17-19H B3450DD26A81048F