InChI=1S/C27H30N2O4/c1-27(2,26(31)32)28-25(30)18-12-13-19-21(16-18)29-14-15-33-22-11-7-6-10-20(22)24(29)23(19)17-8-4-3-5-9-17/h6-7,10-13,16-17H,3-5,8-9,14-15H2,1-2H3,(H,28,30)(H,31,32)