Abstract: A new ent-kaurene diterpene, rabdoforrestin A (1 ) , mp 204- 206°C, [α]22/D -83°(c=0.96,CHCL3)was isolated from the leaves of Rabdosia forrestii (Diels) Hara (Labiatae) collected Lijiang, Yunnan. Its structure has been shown to be ent-11β-hydroxy-2α, 3α,6β, 7α-tetraacetoxy-16-kauren-15-one (1 ) on the basis of spwctroscopic and chemical evidence and compared with known compound lushanrubescensin B .

Key words: Rabdosia forrestii