Three new diosphenols, ent-2-hydroxy-norbeyer-1,4,15-trien-3-one, ent-2,6β-dihydroxy-norbeyer-1,4,15-trien-3-one and ent-2,6α-dihydroxy-norbeyer-1,4,15-trien-3-one, together with stachenol, were isolated and identified spectroscopically from the heartwood of Spirostachys africana.