InChI=1/C16H15N3O4/c1-18(10-11-5-3-2-4-6-11)16(21)13-9-12(19(22)23)7-8-14(13)17-15(16)20/h2-9,21H,10H2,1H3,(H,17,20)/t16-/m1/s1/f/h17H 5857F424A3C33A43