All the five triphenodioxazines were prepared by the oxidative cyclisation of the benzoquinone
KEY WORDS: albumin adduct, benzene oxide, benzoquinone
, nonlinear, variation.
Coenzyme Q (CoQ) encompasses a collection of homologous molecules which consist of a benzoquinone
ring linked to an isoprenoid side chain .
1) is a prenylated benzoquinone
isolated from the roots of Garcinia atroviridis in our laboratory (Permana et al.
The action of the sesquiterpenic benzoquinone
, perezone, on electron transport in biological membranes.
inhibits the voltage-dependent induction of the mitochondrial permeability transition caused by redox-cycling naphthoquinones.
Production of prostacyclin in mice following intraperitoneal injection of acetic acid, phenyl benzoquinone
and zymosan, its role in the writhing response.
Recent studies have indicated that rats are able to metabolize acetochlor, alachlor, butachlor, and metolachlor to their putative DNA-reactive benzoquinone
imine products (16).
These compounds belong to numerous chemical groups including trike-tones, terpenes, benzoquinones
, coumarins, flavonoids, terpenoids, strigolactones, phenolic acids, tannins lignin, fatty acids and non-protein amino acids (Soltys et al.
Consequently, oxygen containing heterocycles (benzofuran, methylbenzofuran, dibenzofuran), carbonyl groups characterizing aldehydes and ketones (acetonaphthones, benzophenones, benzoquinones
, benzaldehydes and their hydroxyl- and hydroxylmethyl derivatives), sulfur containing heterocycles (benzothiazole, benzoisothiazole), and nitriles (benzonitrile and aliphatic nitriles with long hydrocarbon chains) represent other groups of organic compounds identified in this extract.
One of the short-chain benzoquinones
that can maintain this form of complex I-independent respiration is idebenone (INN: 2- (10-Hydroxydecyl)-5,6-dimethoxy-3-methyl-cyclohexa-2,5-diene-1,4- dione).
Miconia species contain triterpenes, coumarins, and benzoquinones
(Gunatilaka et al.