C20H23NO, =293.39, monoclinic, C2/c, a = 19.541(2), b = 7.159(1), c = 24.147(2)Angstrom, beta = 92.65(1)degrees, V = 3374.4(5)Angstrom(3), Z = 8, D-x = 1.16g.cm(-3), CuK alpha radiation (lambda = 1.54178 Angstrom). The final R indice is 0.055 for 2416 observed reflections.