STRUCTURE OF (3-BETA,7-ALPHA-3,7-DIHYDROXYKAUR-16-EN-18-YL ACETATE (LINEAROL)

Abstract

C22H34O4, M(r) = 362.51, monoclinic, P2(1), a = 7.785 (9), b = 11.688 (6), c = 11.792 (7) angstrom, beta 107.18 (6)-degrees, V = 1025 (1) angstrom3, Z = 2, D(m) = 1.145 (4) (by flotation), D(x) = 1.174 g cm-3, lambda(Mo Kalpha)= 0.71069 angstrom, mu = 0.74 cm-1, F(000) = 396, T = 296 K, R = 0.042 for 1240 observed independent reflections. The skeleton of the molecule consists of contacting bicyclo[3.2.1]octane and bicyclo[4.4.0]decane (trans-decalin) systems. All of the cyclohexanes have an approximate chair conformation while the cyclopentane presents an envelope conformation. The CH3 groups occupy axial positions. The COCOCH3 group and its neighbouring OH group are in equatorial positions. The other OH group is in an axial position.