Retronecine-obtained from the herbs of Heliotropium europaeum L

A. Retronecine 


The most common base portion of the pyrrolizidine alkaloids is retronecine.
The ‘Necine’ bases are 1-methylpyrrolizidines of different stereochemical configurations and degree of hydroxylation which invariably occur as esters in alkaloids of SenecioCrotalaria and a plethora of genera of the Boraginaceae as stated earlier.
Biological Source It is obtained from the herbs of Heliotropium europaeum L. (Boraginaceae) (Heliotrope, Turnsole).
Chemical Structure

Retronecine
(1R-trans)-2, 3, 5, 7, a-Tetrahydro-1-hydroxy-1 H-pyrrolizine-7-methanol; (C8H13NO2).
Characteristic Features
1. It is obtained as crystals from acetone having mp 119-120°C.
2. It has the specific optical rotation [α]D20  +4.950 (C = 0.58 in ethanol).
Identification Test It gives the racemic mixture i.e., (±) form as crystals from acetone having mp 130-131°C.
Uses
1. The plant is used for cancer and is popularly known as “Herbe Du Cancer” in Europe.
2. It is also used for snakebite and scorpion stings.

comment 0 nhận xét:

Post a Comment

 
© Pharmacognosy | Plants | herbal | herb | traditional medicine | alternative | Botany | © Copyright 2012 ; Email: epharmacognosy@gmail.com