InChI=1/C19H18N2O4/c1-12-3-4-14(13(2)9-12)6-8-18(22)20-21-19(23)15-5-7-16-17(10-15)25-11-24-16/h3-10H,11H2,1-2H3,(H,20,22)(H,21,23)/b8-6+/f/h20-21H 4A34C3B2930EF94C