InChI=1/C19H20N2O4/c22-16-11-21(19(23)20-14-4-2-1-3-5-14)9-8-15(16)13-6-7-17-18(10-13)25-12-24-17/h1-7,10,15-16,22H,8-9,11-12H2,(H,20,23)/t15-,16+/m0/s1/f/h20H FB31DD621750BCB9