InChI=1/C19H20N2O4/c1-12(15-5-8-17-18(10-15)25-11-24-17)20-19(23)9-14-3-6-16(7-4-14)21-13(2)22/h3-8,10,12H,9,11H2,1-2H3,(H,20,23)(H,21,22)/t12-/m0/s1/f/h20-21H A999FD9D49D23D84