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