InChI=1/C16H20N4O3/c1-3-20-10-13(9-17-20)19-16(21)18-11(2)12-4-5-14-15(8-12)23-7-6-22-14/h4-5,8-11H,3,6-7H2,1-2H3,(H2,18,19,21)/t11-/m0/s1/f/h18-19H 9A8D176344CDCBC8