InChI=1S/C22H33BrO4/c1-12(25)27-17-10-22(4)14-5-6-20(2,19(23)11-24)8-13(14)16(26)7-18(22)21(3)9-15(17)21/h5,13,15-19,24,26H,6-11H2,1-4H3