InChI=1/C19H16N2O4/c22-18-8-5-13-9-14(6-7-17(13)25-18)21-19(23)20-11-15-10-12-3-1-2-4-16(12)24-15/h1-9,15H,10-11H2,(H2,20,21,23)/t15-/m1/s1/f/h20-21H BEDB70DF22A51CBA