InChI=1S/C26H24N2O3/c27-17-20-7-10-23-22(16-20)26(18-30-23)12-14-28(15-13-26)25(29)24-11-9-21(31-24)8-6-19-4-2-1-3-5-19/h1-5,7,9-11,16H,12-15,17-18,27H2