Pitsubcosides A-L, highly esterified eudesmane sesquiterpenoid glycosides with antibacterial activity from Pittosporum subulisepalum and their mechanism.

Background: Plants from the genus Pittosporum are traditionally used as antibacterial, antifungal and antiviral agents. A bioassay evaluation of the extract of Pittosporum subulisepalum revealed antibacterial activity. This study focused on the discovery of the antibacterial metabolism in P.

Structurally Diverse Sesquiterpenoid Glycoside Esters from with Anti-neuroinflammatory Activity.

Thirteen new sesquiterpenoid glycoside esters, including 11 aromadendrane-type compounds, pitqinlingosides A-K (-), one cadinane-type compound, pitqinlingoside L (), and one eudesmane-type compound, pitqinlingoside M (), together with seven known analogues (-) were isolated from the twigs, fruits, and leaves of Structures were elucidated by analysis of spectroscopic data, gas chromatography mass spectrometry (GC-MS), and chemical methods. The absolute configuration was confirmed by single-crystal X-ray crystallography analysis or electronic circular dichroism spectra. Unusual glycoside esters are characterized by the presence of polyacylated β-d-fucopyranosyl, β-d-glucopyranosyl, and β-d-xylopyranosyl units.

Two novel alkaloids from Corydalis curviflora Maxim. and their insecticidal activity.

Background: Botanical pesticide plays an essential role in the control of agricultural pests. Corydalis curviflora Maxim. is used as a cholagogue and larvicide in the rural areas of Northwest China.