InChI=1S/C15H15N3O4/c1-8(19)16-11-4-2-3-9-10(11)7-18(15(9)22)12-5-6-13(20)17-14(12)21/h2-4,12H,5-7H2,1H3,(H,16,19)(H,17,20,21)