InChI=1/C18H20N2O3/c1-3-22-15-10-9-12(11-16(15)23-4-2)17-19-14-8-6-5-7-13(14)18(21)20-17/h5-11,17,19H,3-4H2,1-2H3,(H,20,21)/t17-/m1/s1/f/h20H E19617DAD3F5A70F