InChI=1S/C25H22N2O4/c1-29-23-13-20-21(14-24(23)30-2)26-11-10-22(20)31-17-8-9-18-15(12-17)4-3-5-19(18)25(28)27-16-6-7-16/h3-5,8-14,16H,6-7H2,1-2H3,(H,27,28)