InChI=1S/C29H23NO4/c1-20-25(28(31)32)24(18-17-21-11-5-2-6-12-21)26(27(30-20)23-15-9-4-10-16-23)29(33)34-19-22-13-7-3-8-14-22/h2-16,24,30H,19H2,1H3,(H,31,32)