Lycopodium triterpenoids (10). Triterpenoid constituents of Lycopodium wightianum collected in Borneo.

From Lycopodium wightianum collected in Borneo, two new triterpenoids named wightianol-A and wightianol-B were isolated together with α-onocerin, tohogenol, and lycoclavanin. The structures of the new compounds were established as 14β-serratane-3β, 14β, 20β, 21β, 24-pentol (4a) and serrat-14-ene-3β, 20β, 21β, 24-tetrol (5a), respectively. For comparison, the C3-epimer of lycoclavanin, 16-oxoserrat-14-ene-3β, 20β, 21β, 24-tetrol (14), was prepared and characterized as its tetraacetate.