(redirected from Chromones)


Fundamental unit of various plant pigments and other substances.
See also: flavone, chromene, chroman.
Farlex Partner Medical Dictionary © Farlex 2012
References in periodicals archive ?
The highlighted compounds determined include various cinnamic acids and their derivatives, chromones, anthracene compounds, and flavonoids, some of which have been reported previously in Aloe species.
Lichens are sources of phenolic compounds synthesized mainly via the acetate-polymalonate pathway, which yields dibenzofurans, chromones, naphthoquinones, anthrones, anthraquinones, depsones, depsides, and depsidones [3].
The active compound of aloe vera includes anthroquinones, chromones, polysaccharides, monosaccharides, vitamins, inorganic and organic ingredients, enzymes and upto 99% water.5 Due to the presence of active compounds Aloe Vera possesses anti-diabetic, anti-oxidant, anti-microbial and wound healing activities.6 Aloe vera Gel is effective in certain diseases of gastro intestinal tract such as irritable bowel disease, ulcerative colitis and peptic ulcer.7 Aloevera leaves are laxatives.
Both the greenish leafy skin and inner white/colorless parenchymatous tissue (source of Aloe gel) contain a long list of bioactive compounds including amino acids, peptides, and proteins/enzymes, carbohydrates (unique mono-, di-, and polysaccharides), minerals and vitamins, and secondary metabolites belonging to the general class of anthraquinones/anthrones, chromones, phytosterols, and phenolics.
The thin intermediate layer, composed of chlorenchyma and vascular bundles, produces a yellow bitter tasting exudate called Aloe latex; this liquid contains secondary metabolites such as glycosylated anthrones (up to 35% aloin A and aloin B), glycosylated chromones (aloesin and aloeresin), glycosylated anthraquinones, and polyphenols.
Pharmacotherapy comprises a wide variety of medications like oral antihistamines, topical corticosteroids, oral corticosteroids, topical decongestants, chromones, anticholinergics and anti-leukotrienes.
The chromones of RS are well known as a group of beneficial compounds, including prim-O-glucosylcimifugin, cimifugin, 4'-O-[beta]-D-Glucosyl-5-O-methylvisamminol, and sec-O-Glucosylhamaudol, which are predominantly derived from RS (Dai et al.
Limonoids, mono-, di-, sesqui-, and triterpenoids, coumarins, chromones, lignans, flavonoids and other phenolics were isolated from its certain species with wide-ranging uses in ethnomedicine (Mulholland et al.
and chromones as another major contributor to the unique fragrance of agarwood (Naef 2011).
The three cohorts were then examined with respect to the rhinoconjunctivitis total symptom score (RTSS 0-3, symptoms: sneezing, runny nose, itchy nose, nasal congestion, tearing, and itchy eyes) and the total rescue medication score (TRMS: chromones (eyedrops) = 1 point, antihistamine (oral) = 2 points, corticosteroids (nasal) = 3 points, on demand: leukotriene antagonists = 5 points).