xanthene

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xan·thene

 (zăn′thēn′)
n.
A yellow crystalline organic compound, C13H10O, that is soluble in ether and is used as a fungicide and in organic synthesis. The structural unit of xanthene is a feature in several fluorescent dyes.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

xanthene

(ˈzænθiːn)
n
(Elements & Compounds) a yellowish crystalline heterocyclic compound used as a fungicide; benzo-1,4-pyran. Its molecular structural unit is found in many dyes, such as rhodamine and fluorescein. Formula: CH2(C6H4)2O
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

xan•thene

(ˈzæn θin)

n.
a yellow, crystalline substance, C13H10O, used in organic synthesis and as a fungicide.
[1905–10]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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References in periodicals archive ?
Provectus' intellectual property (IP) includes a family of US and international patents that protect the process by which pharmaceutical grade RB and related xanthenes are produced, reducing the formation of previously unknown transhalogenated impurities that exist in commercial grade RB in uncontrolled amounts.
Provectus - PV-10-based Cancer Combination Therapy Clinical Trial Design Wins Australasian Gastro-Intestinal Trials Group's New Concepts Award
Provectus is a clinical-stage biotechnology company developing a new class of drugs for oncology and dermatology based on a wholly-owned family of chemical small molecules called halogenated xanthenes.
Provectus
Yoon, "Fluorescent chemosensors based on spiroring-opening of xanthenes and related derivatives," Chemical Reviews, vol.
Fluorescent Rosamine/Ti[O.sub.2] Composite Films for the Optical Detection of N[O.sub.2]
Table 1 shows the phototoxicity and dark toxicity of the xanthenes in HEp-2 after 6 h incubation with the dye.
Photodynamic Efficiency of Xanthene Dyes and Their Phototoxicity against a Carcinoma Cell Line: A Computational and Experimental Study
These compounds or phytochemical constituents incorporate terpenes, flavonoid, bioflavonoid, benzophenones, xanthenes and also a few metabolites, for example, tannins, saponins, cyanates, oxalate and anthrax-quinones [6].
Evaluation of Bioactivity and Preliminary Phytochemical Investigation of Herbal Plants Against Ampicillin Resistant Bacteria
The activity of hepatoprotective plants has been related to certain secondary metabolites, such as alkaloids, coumarins, carotenoids, flavonoids, glycosides, lignans, xanthenes, lipids, monoterpenes, and organic acids (Oh et al., 2004; Yan et al., 2009).
Eremophila maculata--isolation of a rare naturally-occurring lignan glycoside and the hepatoprotective activity of the leaf extract
Oncology company Provectus Biopharmaceuticals (NYSE MKT:PVCT) disclosed on Tuesday the receipt of the US patent covering additional aspects of its process for synthesizing halogenated xanthenes, which is part of the family of compound of rose bengal.
Provectus Biopharmaceuticals awarded patent from USPTO for rose bengal analogs
Compound 1 displayed profound inhibition of xanthenes oxidase with IC50 values of 11.920.01 u M, followed by compounds 2 and 3 with IC50 values of 73.74 u M and 97.120.01 u M respectively.
Xanthine Oxidase Inhibition of Bioactive Constituents Isolated from Potentilla evestita
Patent 8,530,675, Process for the Synthesis of 4,5,6,7-tetrachloro-3',6'- dihydroxy-2',4',5',7'-tetraiodo-3H-spiro[isobenzofuran-1,9- xanthen]-3-one (Rose Bengal) and Related Xanthenes. The application details a new process for the manufacture of Rose Bengal and related iodinated xanthenes in high purity.
SYNTHESIS PATENT ALLOWED BY EUROPEAN PATENT OFFICE
Several methods have been reported for the synthesis of xanthenes which includes by using poly(4-vinyl pyridinium) perchlorate [9], task specific acidic ionic liquid [NMP] [H.sub.2]S[O.sub.4] [10], nano silica phosphoric acid [11], HCl[O.sub.4]-Si[O.sub.2] [12], proline triflate in water [13], Iodine [14], In[Cl.sub.3] [15], Sr[(OTf).sub.2] [16] and p-TSA [17].
Tannic Acid an Efficient Catalyst for the Synthesis of 12-aryl-8,9,10,12-tetrahydrobenzo[a]xanthen-11-one Derivatives

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