InChI=1/C19H20N2O4/c1-2-13-6-5-7-14(10-13)21-19(23)18(22)20-11-15-12-24-16-8-3-4-9-17(16)25-15/h3-10,15H,2,11-12H2,1H3,(H,20,22)(H,21,23)/t15-/m1/s1/f/h20-21H 41B38499724C2D77