Alkaloids are natural, organic substances that are predominantly found in plants and normally contain at least one nitrogen atom in their chemical structure. Their basic (alkaline) nature has led to the term alkaloids. Since the identification of the...

Alkaloids are a class of compounds which typically contain nitrogen and have complex, ring structures. They occur naturally in seed bearing plants and are found in berries, bark, fruit, roots and leaves. Often, they are bases which have some...

Alkaloids are a class of compounds that typically contain nitrogen and have complex, ring structures. They naturally occur in seed-bearing plants and are found in berries, bark, fruit, roots, and leaves. Often, they are bases that have some...

This section includes alkaloids which are difficult to classify elsewhere and those which have skeletal types of which there are only a few examples. Among minor classes of alkaloid are the oxazoles, e.g., annuloline, and the pyrazines, e.g.,...

An alkaloid is, strictly speaking, a naturally occurring amine produced by a plant, but amines produced by animals and fungi are also called alkaloids[1]. Many alkaloids have pharmacological effects on humans and other animals. The name derives from the...

This manuscript reviews the history and pharmacognosy of ergot, and describes the isolation/preparation, chemistry, pharmacodynamics, and pharmacotherapeutics of the major ergot alkaloids and their derivatives. A brief discussion of the hallucinogenic properties of lysergic acid diethylamide is also featured. An abbreviated form of the...

PROLOGUE This manuscript reviews the history and pharmacognosy of opium, and describes the chemistry, pharmacology, and therapeutic uses of the major opium alkaloids. An abbreviated form of the material found in this paper is presented in a three-hour lecture format to third year...

President Alvaro Uribe is taking the war on drugs to the supermarket, prohibiting the sale of products made from the coca plant.With the help of more than $600 million a year in U.S. aid, Uribe has strengthened Colombia's anti-narcotics police, seized record tons of cocaine...

The view into Brazil from this Bolivian border city is of an Amazon jungle paradise: an endless green horizon broken only by a patch of urban skyline reflected in a shimmering lagoon.But in the tranquility, authorities see an increasingly sophisticated cocaine trade positioned to supply...