A new neo-clerodane diterpenoid from Salvia farinacea Benth.

Three neo-clerodane were isolated from the aerial parts of Salvia farinacea Benth., and were purified by various technologies, including silica gel, ODS, sephadex LH-20, and their structures were identified by modern spectroscopy techniques as 2β-hydroxy-7,8-dehydrobacchotricuneatin A (1), dugesin C (2), and tonalensin (3). Compound 1 was a new diterpenoid, and compounds 2 and 3 were isolated from this plant for the first time.