InChI=1/C18H21N3O4/c1-3-9-20-15-14(17(24)21(10-4-2)18(20)25)19-13(16(15)23)11-5-7-12(22)8-6-11/h5-8,19,22-23H,3-4,9-10H2,1-2H3/p-1/fC18H20N3O4/h23h/q-1 AE8DB1688B9C0CC6