InChI=1/C26H31BrN2O4/c1-4-17-33-21-13-9-18(10-14-21)23-22(24(30)19-7-11-20(27)12-8-19)25(31)26(32)29(23)16-15-28(5-2)6-3/h7-14,23,31H,4-6,15-17H2,1-3H3/t23-/m0/s1/f/h31h,28H 6A4E00E19980E224