C21H44BrNO2, monoclinic, P12(1)/c1 (no. 14), a = 9.3300(4) Angstrom, b = 55.464(3) Angstrom, c = 9.3710(4) Angstrom, beta = 98.596(1)degrees, V = 4794.8 Angstrom(3), Z = 8, R-gt(F) = 0.045, wR(ref)(F) = 0.053, T = 150 K.