Chemotaxonomic Studies On Psychotria Rostrata And Alseodaphne Perakensis

A chemotaxonomic investigation on the basic fraction of a medicinal plant Psycrotria rostrata, has resulted in the isolation of six alkaloidal components . The structures of these alkaloids were elucidated using spectroscopic methods such as UV, IR, NMR, MS and also by comparison with literature . The alkaloids were found to be chimonanthine , calycanthine, hodgkinsine , a stereoisomer of quadrigemine B, designated as Z-2 and two new compounds, Z-3 and Z-4. All these alkaloids were actually oligamers of either two , three or four units of compounds derived from tryptamines . Chimonanthine , hodgkinsine , Z-2 and Z-4 were made up of pyrrolidinoindoline type structures While calycanthine was

Chemotaxonomy of the Lauraceae: N-Methyl-2,3,6 trimethoxymorphinandien- 7-one, the Major Alkaloid from Alseodaphne perakens'is

The leaves of Alseodaphne perakensis contain one major and a complex mixture of minor alkaloids. The major component was identified as N-methyl-2,3, 6-trimethoxymorphinandien-7-one by spectroscopic analyses of the parent compound, its methiodide salt and sodium borohydride reduction products

Isolation of Steroidal Saponin from Dracaena umbratical / Raudhatul Jannah Mohd Zuki et al.

Steroidal saponins are important class of components found in plants that play several crucial bioactivities based on previous studies. One known steroidal saponin was successfully isolated from Dracaena umbratica, a shrub of Dracaenaceae family. Dracaena umbratica also known as ‘Senjuang’ among local people. The isolation of a white amorphous steroidal saponin was conducted via normal phase vacuum liquid chromatography eluted with methanol. Its structure was established by spectroscopic analysis as 3-O-[α-L-rhamnopyranosyl (14)-α-L-rhamnopyranosyl (14)-β-D-glucopyranosyl]-25(R)-spirost-5-en-3β-ol

Antioxidant activity of different plant parts extracts of Dracaena umbratica Ridl

Medicinal plants contain phytochemicals which show various significant biological and pharmacological activities. In this study, the hexane, dichloromethane and methanol extracts from different parts (leaves, rhizomes and roots) of a local medicinal plant, Dracena umbratica, Ridl (Agavaceae) were evaluated for antioxidative activity using ferric thiocyanate (FTC) method and also DPPH (1,1-diphenyl-2-picrylhydrazyl) radical scavenging assay. The results showed that all the extracts exhibited weak radical scavenging activity and differ significantly from the standard antioxidants which are vitamin C and butylated hydroxytoluene (BHT). However results from the ferric thiocyanate (FTC) method showed that all the extracts except that of hexane and dichloromethane extracts of the rhizome of this plant possess high antioxidative property which was comparable to the standard reference, BHT. The antioxidative activity of these extracts did not differ significantly (P<0.5) from BHT. These results suggest that this plant species may have low content of radical scavenging compounds but can still be developed as potential antioxidant

Overall proportions of documentation (adherence).

<p>Overall proportions of documentation (adherence).</p

Documented assessment for warning signs and physical examination and hemodynamic status.

<p>Documented assessment for warning signs and physical examination and hemodynamic status.</p

Overall outcomes.

<p>Overall outcomes.</p

Disease notification.

<p>Disease notification.</p

Documented patient monitoring.

<p>Documented patient monitoring.</p