InChI=1S/C27H26N2O4/c1-19-12-13-24-23(10-5-11-25(24)32-18-26(30)31)22(19)14-16-33-29-27(20-7-3-2-4-8-20)21-9-6-15-28-17-21/h2-11,15,17H,12-14,16,18H2,1H3,(H,30,31)