A new indole alkaloid, antioxidant and antibacterial activities of crude extracts from .

The new acylated indole alkaloid glucoside indole-3-carboxylic acid-(6'--caffeoyl)-β-D-glucoside has been isolated from the ethyl acetate (EtOAC) extract of Coss. & Dur. (Lamiaceae) together with eight known secondary metabolites -.

New cycloartane-type ester triterpenes from Euphorbia pterococca and biological evaluation.

From acetonic extract of the whole plant Euphorbia pterococca Brot. (Euphorbiaceae), four new cycloartane-type ester triterpenes named cycloartenyl-2'E,4'E-decadienoate (1), cycloartenyl-2'E,4'Z-decadienoate (2), 24-methylenecycloartanyl-2'E,4'Z-tetradecadienoate (3), and 24-oxo-29-norcycloartanyl-2'E,4'Z-hexadecadienoate (4) were obtained along with nine known tetracyclic triterpenes (5-13). Their structures were established mainly by extensive use of spectroscopic techniques, including 1D (H and C) and 2D homo- and heteronuclear NMR experiments (COSY, HSQC, HMBC and NOESY), and mass spectrometry (HRESIMS), and by comparison with data reported in the literature.

Antioxidant and antibacterial activities and polyphenolic constituents of Helianthemum sessiliflorum Pers.

In this study, the various extracts of aerial parts of Helianthemum sessiliflorum Pers. were examined in vitro for possible source of antioxidants and for antibacterial activity. The antioxidant activity was performed by DPPH radical scavenging method which showed that ethyl acetate extract possessed the best antioxidant potential (IC = 32.