TY  - JOUR
AU  - Obradović, Darija
AU  - Jovanović, Dušan
AU  - Pesić, Suncica
AU  - Tomić, Jovana
AU  - Oljačić, Slavica
AU  - Nikolić, Katarina
AU  - Agbaba, Danica
PY  - 2019
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/3368
AB  - The retention behavior of ivabradine, its 11 related compounds, diltiazem and verapamil has been examined by thin-layer chromatography using non-polar stationary phase (RP-18) and the following mobile phases: methanol-6.25% aqueous ammonia, tetrahydrofuran - 6.25% aqueous ammonia, and also polar stationary phase (silica gel) with tetrahydrofuran - 6.25% methanolic ammonia as mobile phase. In the examined chromatographic systems, linear relationships were established between the retention coefficients, R-M(0) and m, and molecular properties of the investigated antiarrhythmic drugs. The Quantitative Structure Retention Relationship (QSRR) modeling was performed with use of the stepwise multiple linear regression, in order to select the most important molecular properties which influence the retention behavior. The developed models revealed that apart from lipophilicity also the molecular volume (V), and the hydrogen bond basicity (B) of the tested compounds are the most important for the retention behavior in the examined chromatographic systems.
PB  - Taylor & Francis Inc, Philadelphia
T2  - Journal of Liquid Chromatography & Related Technologies
T1  - Analysis of the retention behavior of selected antiarrhythmics by means of thin-layer chromatography
SP  - 1
EP  - 7
DO  - 10.1080/10826076.2019.1585613
ER  - 

@article{
author = "Obradović, Darija and Jovanović, Dušan and Pesić, Suncica and Tomić, Jovana and Oljačić, Slavica and Nikolić, Katarina and Agbaba, Danica",
year = "2019",
abstract = "The retention behavior of ivabradine, its 11 related compounds, diltiazem and verapamil has been examined by thin-layer chromatography using non-polar stationary phase (RP-18) and the following mobile phases: methanol-6.25% aqueous ammonia, tetrahydrofuran - 6.25% aqueous ammonia, and also polar stationary phase (silica gel) with tetrahydrofuran - 6.25% methanolic ammonia as mobile phase. In the examined chromatographic systems, linear relationships were established between the retention coefficients, R-M(0) and m, and molecular properties of the investigated antiarrhythmic drugs. The Quantitative Structure Retention Relationship (QSRR) modeling was performed with use of the stepwise multiple linear regression, in order to select the most important molecular properties which influence the retention behavior. The developed models revealed that apart from lipophilicity also the molecular volume (V), and the hydrogen bond basicity (B) of the tested compounds are the most important for the retention behavior in the examined chromatographic systems.",
publisher = "Taylor & Francis Inc, Philadelphia",
journal = "Journal of Liquid Chromatography & Related Technologies",
title = "Analysis of the retention behavior of selected antiarrhythmics by means of thin-layer chromatography",
pages = "1-7",
doi = "10.1080/10826076.2019.1585613"
}

Obradović, D., Jovanović, D., Pesić, S., Tomić, J., Oljačić, S., Nikolić, K.,& Agbaba, D.. (2019). Analysis of the retention behavior of selected antiarrhythmics by means of thin-layer chromatography. in Journal of Liquid Chromatography & Related Technologies
Taylor & Francis Inc, Philadelphia., 1-7.
https://doi.org/10.1080/10826076.2019.1585613

Obradović D, Jovanović D, Pesić S, Tomić J, Oljačić S, Nikolić K, Agbaba D. Analysis of the retention behavior of selected antiarrhythmics by means of thin-layer chromatography. in Journal of Liquid Chromatography & Related Technologies. 2019;:1-7.
doi:10.1080/10826076.2019.1585613 .

Obradović, Darija, Jovanović, Dušan, Pesić, Suncica, Tomić, Jovana, Oljačić, Slavica, Nikolić, Katarina, Agbaba, Danica, "Analysis of the retention behavior of selected antiarrhythmics by means of thin-layer chromatography" in Journal of Liquid Chromatography & Related Technologies (2019):1-7,
https://doi.org/10.1080/10826076.2019.1585613 . .

TY  - JOUR
AU  - Homšek, Irena
AU  - Parojčić, Jelena
AU  - Dacević, Mirjana
AU  - Petrović, Ljiljana
AU  - Jovanović, Dušan
PY  - 2010
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/1404
AB  - The Biopharmaceutics Classification System (BCS) represents the framework for predicting the intestinal drug absorption based on its solubility and intestinal permeability. Recent research has lead to the use of in vitro tests to waive additional in vivo bioequivalence studies for some pharmaceutical products (i.e. biowaiver). The current regulations permit waivers for BCS Class I (highly soluble/highly permeable) drug substances, which represent up to 25% of the drugs. Efforts in both the science and regulatory bodies are being made to extend biowaivers to certain Class II and III products, which would represent more than 50% of all drugs coming to the market. The aim of this study was to investigate the influence of experimental conditions on metformin hydrochloride (CAS 1115-70-4) release from two immediate-release tablet formulations with proven bioequivalence and justify the biowaiver request for dissolution profile similarity in three pH media. The results obtained indicate that differences in drug dissolution observed in vitro were not reflected in vivo. Such data support the existing idea that BCS Class III drugs are eligible biowaiver candidates, even if a very rapid dissolution criterion is not fulfilled.
PB  - ECV-Editio Cantor Verlag Medizin Naturwissenschaften, Aulendorf
T2  - Arzneimittelforschung - Drug Research
T1  - Justification of metformin hydrochloride biowaiver criteria based on bioequivalence study
VL  - 60
IS  - 9
SP  - 553
EP  - 559
DO  - 10.1055/s-0031-1296324
UR  - https://hdl.handle.net/21.15107/rcub_farfar_1404
ER  - 

@article{
author = "Homšek, Irena and Parojčić, Jelena and Dacević, Mirjana and Petrović, Ljiljana and Jovanović, Dušan",
year = "2010",
abstract = "The Biopharmaceutics Classification System (BCS) represents the framework for predicting the intestinal drug absorption based on its solubility and intestinal permeability. Recent research has lead to the use of in vitro tests to waive additional in vivo bioequivalence studies for some pharmaceutical products (i.e. biowaiver). The current regulations permit waivers for BCS Class I (highly soluble/highly permeable) drug substances, which represent up to 25% of the drugs. Efforts in both the science and regulatory bodies are being made to extend biowaivers to certain Class II and III products, which would represent more than 50% of all drugs coming to the market. The aim of this study was to investigate the influence of experimental conditions on metformin hydrochloride (CAS 1115-70-4) release from two immediate-release tablet formulations with proven bioequivalence and justify the biowaiver request for dissolution profile similarity in three pH media. The results obtained indicate that differences in drug dissolution observed in vitro were not reflected in vivo. Such data support the existing idea that BCS Class III drugs are eligible biowaiver candidates, even if a very rapid dissolution criterion is not fulfilled.",
publisher = "ECV-Editio Cantor Verlag Medizin Naturwissenschaften, Aulendorf",
journal = "Arzneimittelforschung - Drug Research",
title = "Justification of metformin hydrochloride biowaiver criteria based on bioequivalence study",
volume = "60",
number = "9",
pages = "553-559",
doi = "10.1055/s-0031-1296324",
url = "https://hdl.handle.net/21.15107/rcub_farfar_1404"
}

Homšek, I., Parojčić, J., Dacević, M., Petrović, L.,& Jovanović, D.. (2010). Justification of metformin hydrochloride biowaiver criteria based on bioequivalence study. in Arzneimittelforschung - Drug Research
ECV-Editio Cantor Verlag Medizin Naturwissenschaften, Aulendorf., 60(9), 553-559.
https://doi.org/10.1055/s-0031-1296324
https://hdl.handle.net/21.15107/rcub_farfar_1404

Homšek I, Parojčić J, Dacević M, Petrović L, Jovanović D. Justification of metformin hydrochloride biowaiver criteria based on bioequivalence study. in Arzneimittelforschung - Drug Research. 2010;60(9):553-559.
doi:10.1055/s-0031-1296324
https://hdl.handle.net/21.15107/rcub_farfar_1404 .

Homšek, Irena, Parojčić, Jelena, Dacević, Mirjana, Petrović, Ljiljana, Jovanović, Dušan, "Justification of metformin hydrochloride biowaiver criteria based on bioequivalence study" in Arzneimittelforschung - Drug Research, 60, no. 9 (2010):553-559,
https://doi.org/10.1055/s-0031-1296324 .,
https://hdl.handle.net/21.15107/rcub_farfar_1404 .