InChI=1/C19H20N2O3/c22-19(21-15-9-8-13-4-3-5-14(13)10-15)20-11-16-12-23-17-6-1-2-7-18(17)24-16/h1-2,6-10,16H,3-5,11-12H2,(H2,20,21,22)/t16-/m1/s1/f/h20-21H F77462ED1B3EF291