Alkaloids. Alkaloids, Plant . Plant Alkaloids . Organic nitrogenous bases. Many alkaloids of medical importance occur in the animal and vegetable kingdoms, and some have been synthesized. (Grant & Hackh's Chemical Dictionary, 5th ed) . 1.00
Indole Alkaloids. Alkaloids, Indole . Group of alkaloids containing a benzylpyrrole group (derived from TRYPTOPHAN) . 0.79
Alkalies. Alkalis . Alkali . Bases . Alkaline Substances . Basic Substances . Usually a hydroxide of lithium, sodium, potassium, rubidium or cesium, but also the carbonates of these metals, ammonia, and the amines. (Grant & Hackh's Chemical Dictionary, 5th ed) . 0.77
Opiate Alkaloids. Opiates . Opiates, Alkaloid . Alkaloid Opiates . Alkaloids, Opiate . Alkaloids found in OPIUM from PAPAVER and their derivatives that induce analgesic and narcotic effects by action upon OPIOID RECEPTORS. . 0.76
Ergot Alkaloids. Clavine Alkaloids . Alkaloids, Clavine . Alkaloids, Ergot . Alkaloids originally isolated from the ergot fungus Claviceps purpurea (Hypocreaceae). They include compounds that are structurally related to ergoline (ERGOLINES) and ergotamine (ERGOTAMINES). Many of the ergot alkaloids act as alpha-adrenergic antagonists. . 0.76