InChI=1/C20H18N2O4/c1-11-15-4-3-14(23)9-18(15)26-20(25)16(11)10-19(24)22-13-2-5-17-12(8-13)6-7-21-17/h2-9,11,16-17,23H,10H2,1H3,(H,22,24)/t11-,16+,17-/m1/s1/f/h22H 73269DADBD453F16