Two new triterpenoid saponins, cincholic acid-3-O-β-D-xylopyranoside, 28-O-β-D-glucopyranosyl ester (1), quinovic acid-28-O-β-D-glucopyranosyl ester ( 4), and a new phenolic glucoside, 4-[ 4′-O-( 2′, 3′, 5′, 6′-tetrahydroxy phenyl)-β-D-glucoside]-1-butene (2), along with five known triterpenoid saponins and one phenolic glucoside were isolated from the n-butanol fraction of the stems of Luculia pinciana Hook. Their structures were established by means of spectroscopic methods.

Two new triterpenoid saponins, quinovic acid–3–O-6–deoxy-β–D-glucopyranoside, 28–β–D– glucopyranosyl ester and quinovic acid–3–O–α–L–rhamnopyranosyl-(4→1)–β–D–glucopyrano- side, along with three known saponins, have been isolated from the EtOAc extracts of the dried stems of N. sessilifolia Merr. Structure elucidation of 1-3 was based on NMR, MS, IR and chemical analysis.

Three new compounds, 2-methoxy-3,4-(methylenedioxy) benzophenone (1), 4-hydroxy-2,3-dimethoxybenzophenone (2), and 3-hydroxy-4,6-dimethoxy-9H-xanthen-9-one (3), besides three known compounds were isolated from the roots of Securidaca inappendiculata. Their structures were established by spectroscopic means and X-ray crystallographic diffraction analysis. The biogenetic relationships among these six compounds are discussed.

A new triterpene named luculiaoic acid A（1）, showing inhibitory activity of a leukaemia cell line, along with eleven known compounds, has been isolated from the ethyl acetate extract of the stems of the Luculia pinciana Hook. All the structures were elucidated on the basis of the NMR, MS, and IR methods. The activity to inhibit Staphylococcus aureus and Candida albicans of all compounds showed that ursolic acid inhibits the growth of Staphylococcus aureus with an MIC of 0.5 mg/ml and an MBC of 10 mg/ml, and scopletin inhibits the Candida albicans with MIC 1 mg/ml and MBC 5 mg/ml.