InChI=1/C26H23NO4/c1-16-13-20(30-25(29)18-5-7-19(8-6-18)26(2,3)4)15-21-23(16)24(28)22(31-21)14-17-9-11-27-12-10-17/h5-15H,1-4H3/b22-14- D1437A2FE117BA84