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Related to naphthoquinone: naphthalene


1. A quinone derivative of naphthalene, reducible to naphthohydroquinone; 1,4-naphthoquinone derivatives have vitamin K activity (for example, menaquinone).
2. A class of compounds containing the naphthoquinone (1) structure.
References in periodicals archive ?
Quantification of p- phenylenediamine and 2-hydroxy-1, 4- naphthoquinone in henna tattoos.
This lack of activity was most likely caused by the high cytotoxicity of naphthoquinones present in the extracts (Brandao et al.
In summary, we may observe that while the composition of the secretions of the three species is similar in constituting mixtures of ketones and naphthoquinones, there are significant differences both qualitative and quantitative.
Naphthoquinone pigments related to fusarubin from the fungus Fusarium solani (mart) sacc.
At the loadings tested here, diiodomethyl-p-tolylsulfone, copper metal, naphthoquinone, fludioxonil, and tebuconazole on their own did not give good performance; all had ratings under 7 after weathering.
Henna extract contains lawsone (C10H6O3), the active ingredient and a naturally occurring naphthoquinone.
NADPH is essential for the vitamin K cycle, in which the epoxide form of vitamin K is converted back to the naphthoquinone form, which is required for [gamma]-carboxylation of osteocalcin (2).
We had previously prepared electron beam resists on the basis of halogenophenol novolacs (HPN) with naphthoquinone diazide or bisazide and obtained an increase in sensitivity (6-9) caused by additional crosslinking via halogen elimination.
Therapeutic claims were generally based on content of the naphthoquinone lapachol, a known constituent of Tabebuia, which had shown promise as an anti-tumor agent, but was abandoned because of unfavourable dose-toxicity characteristics.
Summary: A number of 2-(aryl/alkyl)thio-3-chloro-l,4-naphthoquinones (3a-g) and 2,3- (aryl/alkyl)thio-l,4-naphthoquinones (4a-d, 4f-g) were obtained by the reactions of 2,3-dichloro-1,4- naphthoquinone (1) with some various thiols and subsequently used as building blocks for the synthesis of 2-(arylthio)-3-amino-1,4-naphthoquinone (5a-c, 5f) derivatives.
Antitumor activity of liposomal naphthoquinone esters isolated from Thai medicinal plant: rhinacanthus nasutus Kurz," Biological and Pharmaceutical Bulletin, vol.