QSTR Studies Regarding the ECOSAR Toxicity of Benzene-Carboxylic Acid' Esters to Fathead Minnow Fish (Pimephales promelas)

ISSN: 1875-6697 (Online)
ISSN: 1573-4099 (Print)

Volume 12, 4 Issues, 2016

Download PDF Flyer

Current Computer-Aided Drug Design

Aims & ScopeAbstracted/Indexed in

Submit Abstracts Online Submit Manuscripts Online

Subhash C. Basak
Departments of Chemistry, Biochemistry & Molecular Biology University of Minnesota Duluth
Duluth, MN 55811

View Full Editorial Board

Subscribe Purchase Articles Order Reprints

Current: 1.155
5 - Year: 1.297

QSTR Studies Regarding the ECOSAR Toxicity of Benzene-Carboxylic Acid' Esters to Fathead Minnow Fish (Pimephales promelas)

Current Computer-Aided Drug Design, 10(2): 99-106.

Author(s): Laszlo Tarko, Mihai V. Putz, Cosmin Ionascu and Ana-Maria Putz.

Affiliation: (Laszlo Tarko) Center of Organic Chemistry “C.D. Nenitzescu” of Romanian Academy, 202B Spl. Independentei, PO Box 35-108, RO-060023, Bucharest - 6th Sector, Romania.


The present work employs 152 benzene-carboxylic acid' esters having computed the toxicity within the range [2.251, 10.222] for fathead minnow fish (Pimephales promelas). Calibration set includes many pairs having very similar chemical structure, size, shape and hydrophilicity, but very different value of ECOSAR toxicity or vice versa. The QSTR study, which uses all esters as calibration set, emphasized a large percent (16.2%) of outliers. In this QSTR study most of the estimated values of toxicity for outliers are much lower than ECOSAR toxicity. The LogP and some aromaticity descriptors are predictors. The best QSTR for esters having low value (< 5.5) of ECOSAR toxicity and the best QSTR for esters having high value (> 5.5) of ECOSAR toxicity are obtained when the number of outliers is very small. These QSTRs are different enough and highlight opposite influences of certain descriptors on toxicity. The results emphasize two possibilities: (a) the esters having low value of ECOSAR toxicity and the esters having high value of ECOSAR toxicity are included in two different classes from the point of view of structure-toxicity relationship and/or (b) many high values of ECOSAR toxicity are wrong. By comparison, a QSTR using experimental values of toxicity against rats for 37 benzene-carboxylic esters included in the same database gives good correlation experimental/computed values of toxicity, the number of outliers is null and the result of validation test is good.


Benzene-carboxylic acid esters, ECOSAR toxicity, fathead minnow, QSTR, PRECLAV.

Purchase Online Order Reprints Order Eprints Rights and Permissions

Article Details

Volume: 10
Issue Number: 2
First Page: 99
Last Page: 106
Page Count: 8
DOI: 10.2174/1573409910666140410094056
Price: $58

Related Journals

Webmaster Contact: urooj@benthamscience.org Copyright © 2016 Bentham Science