InChI=1/C19H18N2O4/c1-2-21-14-8-7-13(9-12(14)10-18(21)22)20-19(23)17-11-24-15-5-3-4-6-16(15)25-17/h3-9,17H,2,10-11H2,1H3,(H,20,23)/t17-/m1/s1/f/h20H 3E87D3953C3930D3