InChI=1S/C30H25NO3/c1-4-31(21-12-9-19(2)10-13-21)22-14-15-25-28(18-22)33-27-16-11-20(3)17-26(27)30(25)24-8-6-5-7-23(24)29(32)34-30/h5-18H,4H2,1-3H3