13C-NMR Spectral Data of Alkaloids Isolated from Psychotria Species (Rubiaceae).

Secondary metabolites from Rubiaceae species.

This study describes some characteristics of the Rubiaceae family pertaining to the occurrence and distribution of secondary metabolites in the main genera of this family. It reports the review of phytochemical studies addressing all species of Rubiaceae, published between 1990 and 2014. Iridoids, anthraquinones, triterpenes, indole alkaloids as well as other varying alkaloid subclasses, have s...

Absence of alkaloids in Psychotria carthagenensis Jacq. (Rubiaceae).

Psychotria viridis and P. carthagenensis are often discussed in relation to the hallucinogenic beverage Ayahuasca, used for religious, medicinal and social purposes. The significance of including Psychotria species in this beverage has been understood on the basis of substantial amounts of tryptamine alkaloids detected on leaves of both P. viridis and P. carthagenensis. Nevertheless, there is a...

Cytotoxic activity of polyindoline alkaloids of Psychotria forsteriana (Rubiaceae) (1).

1-Cover to Abreviations

The plants of Psychotria ipecacuanha (Brot.) Stokes (Rubiaceae) are perennial subshrubs (20 40 cm), the natural habitat of which is the understory in tropical hot humid forest of Central and South America. The roots of P. ipecacuanha are reddish-brown; consist of twisted fragments of around 15 cm long, no thicker than 6 mm and annulated (fig. 1.1.-A). The best known active principles in this pl...

Neonaucline, a new indole alkaloid from the leaves of Ochreinauclea maingayii (Hook. f.) Ridsd. (Rubiaceae).

A new indole alkaloid; neonaucline (1), along with six known compounds-Cadamine (2), naucledine (3), harmane, benzamide, cinnamide and blumenol A-were isolated from the leaves of Ochreinauclea maingayii (Rubiaceae). In addition to that of compound 1, (13)C-NMR data of cadamine (2) and naucledine (3) were also reported. Structural elucidations of these alkaloids were performed using spectroscopi...