From the whole plants of Aster sampsonii, ten compounds were isolated, and were characterized as (4alphaR, 4'alphaR, 5S, 5'S, 9alphaR, 9'alphaR)-4, 4', 4alpha, 4'alpha, 5, 5', 6, 6', 7, 7', 8, 8'-dodecahydro-3, 3', 4alpha, 4'alpha, 5, 5'-hexamethyl-2H, 2'H-9alpha, 9' alpha-binaphtho[2, 3-b]furan-2,