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3- Alkylpyridinium are natural compounds that are found in marine sponges belonging to the order Haplosclerida. These compounds consist of abundant biological activities such as antitumor drugs, transfection agents or components used in antifouling paints. 3- Alkylpyridinium polymers are potent anticholinesterase agents, in addition, they show hemolytic and cytotoxic activities.


4-Acetamidophenol is a widely used analgesic and antipyretic drug that is used for the relief of fever, headaches, and other minor aches and pains. It is a major ingredient in numerous cold and flu medications and many prescription analgesics.

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4-Aminoantipyrine is a metabolite of aminopyrine with analgesic, anti-inflammatory, and antipyretic properties. Due to the risk of agranulocytosis its use as a drug is discouraged. Instead it is used as a reagent for biochemical reactions producing peroxides or phenols. It stimulates liver microsomes and is also used to measure extracellular water.

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4-Hydroxycoumarins are a class of vitamin K antagonist anticoagulant drug molecules derived from coumarin by adding a hydroxy group at the 4 position to obtain 4-hydroxycoumarin, then adding a large aromatic substituent at the 3-position. The large 3-position substituent is required for anticoagulant activity.

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5-Cholesten-3b-ol is an organic chemical substance classified as a waxy steroid of fat. It is an essential structural component of mammalian cell membranes and is required to establish proper membrane permeability and fluidity. In addition, 5-cholesten-3b-ol is an important component for the manufacture of bile acids, steroid hormones, and vitamin D. It is the principal sterol synthesized by animals, predominantly in the liver; however, small quantities can be synthesized in other eukaryotes such as plants and fungi. It is almost completely absent among prokaryotes, i.e. bacteria. Although cholesterol is important and necessary for the aforementioned biological processes, high levels of cholesterol in the blood have been linked to damage to arteries and cardiovascular disease.

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5-Hydroxyoxindole has been identified as a urinary metabolite of indole, which is produced from tryptophane via the tryptophanase activity of gut bacteria. 5-hydroxyoxindole is an endogenous compound in blood and tissues of mammals, including humans.

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7-Bromo-1-Heptene is used in medicine products and food additive.

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Acetyl chloride undergoes reaction with decalin and aluminum trichloride to afford a tricyclic enol ether.[3] It promotes the cyclopropanation of alkene with dibromomethane or diiodomethane in the presence of Zn dust and copper chloride in ether.[4] Friedel-Crafts reaction of acetyl chloride with benzene in the presence of MCl3 (M = Al or Fe) in the ionic liquid 1-butyl-3-methylimidazolium chloride affords MCl3 adducts of the acetyl chloride, the acetylium ion [CH3CO]+[MCl4]- and the MCl3 adduct of acetophenone.

Alpha Lipoic Acid

Alpha Lipoic Acid is an antioxidant. It is quickly absorbed from the gastrointestinal tract. Alpha Lipoic Acid dissolves in both water and fat in the body.


Alpinumisoflavone is a pyranoisoflavone, a type of isoflavone. It can be found in the bark of Rinorea welwitschii. It can also be found in the molluscicide plant Millettia thonningii and is thought to be an antischistosomal agent since it has been shown to kill the snails which transmit the schistosomiasis and also the larvae of the parasite itself.

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