The chemistry of some derivatives of (+)-6β-hrcroxy-7β(H)-eudesma-4,11-dien-3-one (IV) is described. In particular, the stereochemistry of the reduction products of (+)-7β(H)-eudesma-4,11-dien-3-6-dione (IX) with zinc in acetic acid is established. The 6β-configuration for the hydroxyl group in the ketone (IV) is confirmed by a chemical method.