Quinuclidine alkaloids

Quinine is a medication used to treat malaria and babesiosis. This includes the treatment of malaria due to Plasmodium falciparum that is resistant to chloroquine when artesunate is not available. While sometimes used for nocturnal leg cramps, quinine is not recommended for this purpose due to the risk of serious side effects. It can be taken by mouth or intravenously. Malaria resistance to quinine occurs in certain areas of the world. Quinine is also used as an ingredient in tonic water and other beverages to impart a bitter taste.

Quinidine is a class IA antiarrhythmic agent used to treat heart rhythm disturbances. It is a diastereomer of antimalarial agent quinine, originally derived from the bark of the cinchona tree. The drug causes increased action potential duration, as well as a prolonged QT interval. As of 2019, its IV formulation is no longer being manufactured for use in the United States.

Cinchonine is an alkaloid found in Cinchona officinalis. It is used in asymmetric synthesis in organic chemistry. It is a stereoisomer and pseudo-enantiomer of cinchonidine.

Cinchonidine is an alkaloid found in Cinchona officinalis and Gongronema latifolium. It is used in asymmetric synthesis in organic chemistry.

Tabernanthine is an alkaloid found in Tabernanthe iboga. It has been used in laboratory experiments to study how addiction affects the brain. Tabernanthine persistently reduced the self-administration of cocaine and morphine in rats.

Dihydroquinine, also known as hydroquinine or DHQ, is an organic compound and as a cinchona alkaloid closely related to quinine. The specific rotation is −148° in ethanol. A derivative of this molecule is used as chiral ligand in the AD-mix for Sharpless dihydroxylation.

Dihydroquinidine (also called hydroquinidine) is an organic compound, a cinchona alkaloid closely related to quinine. The specific rotation is +226° in ethanol at 2 g/100 ml. A derivative of this molecule is used as chiral ligand in the AD-mix for Sharpless dihydroxylation.