A new diterpene from the stems of Trigonostemon heterophyllus / 中国天然药物

ABSTRACT

AIM@#To investigate the chemical constituents in the stems of Trigonostemon heterophyllus.@*METHOD@#The chemical constituents were isolated by column chromatography on silica gel, Rp-18, and Sephadex LH-20, and their structures were elucidated on the basis of spectroscopic analysis.@*RESULTS@#Three compounds were isolated and identified as a new diterpene, trigonoheterene B (1), together with two known compounds, trigonostemone (2) and trigonochinene B (3).@*CONCLUSION@#Compound 1 is new. Compounds 2 and 3 showed antibacterial activities.