garciniavalline (1), a novel aporphinoid alkaloid, in addition to four known alkaloids,cleistopholine (2), o-methylmoschatoline (3), (-)-oliveroline (4) and (-)-oliveridine (5), wereisolated and characterized from garcinia parvifolia miq. stem bark. structural elucidation ofthese compounds was established by spectroscopic methods. among them, alkaloids (2) and (4)exhibited antiplasmodial activi...

The ergot alkaloid ergovaline has demonstrated a persistent and sustained contractile response in several different vascular models. It was hypothesized that different alkaloids isolated from tall fescue (Lolium arundinaceum) will contribute to this contractile response differently. The objective was to compare contractile-response patterns of single additions of the ergoline alkaloids lysergic...

[email protected] Abstract Alkaloids are nitrogen-containing compounds found in plants. Most are highly valued for their role in wide array of ailments such as anti-malarial, anti-cancerous, analgesics, and many more. In lights of tremendous interest in recent years on the chemistry and pharmacological properties of alkaloids, comprehensive data have been collected. Forest industrie...

Polyhydroxylated pyrrolidine, piperidine, and indolizidine alkaloids are of great interest because of their specific glycosidase inhibitory activity." Moreover, it has recently been found in our laboratories that swainsonine (1), a representative of the polyhydroxylated indolizidine alkaloids, has an immunostimulating activity, possibly as a result of its glycosidase inhibitory activity.21 This...

A total of 20 new indole alkaloids comprising mainly oxidized derivatives of macroline- (including alstofonidine, a macroline indole incorporating a butyrolactone ring-F), pleiocarpamine-, and sarpagine-type alkaloids were isolated from the bark and leaf extracts of Alstonia angustifolia. The structures and relative configurations of these alkaloids were determined using NMR and MS analyses and...

The present report deals with the pharmacological properties of a series of quaternary tetrahydrobenzylisoquinoline, phenylethylamine and phenanthropyridine alkaloids, isolated from Magnolia and Cocculus plants by Prof. Tomita et al. (1). Marsh et al. (2) reported that some of the quaternary alkaloids isolated from the Cocculus plants showed a considerable curare-like activity. Ogiu and Morita ...

Plants of the Calycanthaceae family, which possesses four genera and about 15 species, are mainly distributed in China, North America and Australia. Chemical studies on the Calycanthaceae have led to the discovery of about 14 alkaloids of different skeletons, including dimeric piperidinoquinoline, dimeric pyrrolidinoindoline and/or trimeric pyrrolidinoindolines, which exhibit significant anti-c...

Stemmadenia tomentosa var. palmeri, Voacanga africana, Apocynaceae, Cell Suspension Cultures, Indole Alkaloids Cell suspension cultures of Stemmadenia tomentosa synthesized under normal growth condition the eight major indole alkaloids: (-)-tabersonine, (—)-minovincinine, (+)-conoflorine (voaphylline), condylocarpine, (+)-tubotaiwine (dihydrocondylocarpine), (-)-norfluorocurarine (vincanine), (...

The differential incorporation of doubly labelled strictosidine and vincoside into several indole alkaloids belonging to the Corynanthe (3a and 3p series), Aspidosperma, and lboga types in three plant families has been studied, and it has been demonstrated that only strictosidine is incorporated while vincoside is metabolically inert in these plants with regard to alkaloid formation. During the...