InChI=1S/C20H31BrO2/c1-13-7-6-9-19(3,4)18(13)16(22)11-14(2)15-8-10-20(5,23)17(21)12-15/h6,9,11,15-18,22-23H,1,7-8,10,12H2,2-5H3/b14-11+/t15?,16-,17?,18?,20-/m1/s1