Abstract: A new ent-kauranoid named rabdoternin H(1) was isolated from the aerial part of Isodon ternifolius and is structure was determined by the spectroscopic methods. Five known ent-kaurane diterpenoids, isodonal (2), longikaurin A,E,g(3-5)and effusanin E(6), together with luteolin (7), apigenin(8),α-amyrin(9),ursolic acid(10)and 2α-hydroxy-ursolic acid (11)were also reported in this paper.

Key words: Isodon ternifolius