Pub Date : 2023-01-01DOI: 10.26850/1678-4618eqj.v48.1.2023.p72-94
Maher Ali Almaqtari, N. Al-Odaini, F. Alarbagi, Hussein Al-Maydama
A new, quick, easy, affordable and eco-friendly simultaneous spectrophotometric method for determining a combined sitagliptin and metformin hydrochloride in pharmaceutical formulations was developed and validated using two chemometrics technique. These two methods are the partial least square (PLS) and principal component regression (PCR). They do not need to do a sample preparation or separation before analysis. Various drug concentrations and instrumental spectra of 25 mixed solutions of a combination of sitagliptin and metformin hydrochloride were used for model construction in the range of 200�270 nm. The R2 values of 0.9994 and 0.9996 assigned for the PLS of the sitagliptin and metformin hydrochloride and that of 0.9987 and 0.9996 for the PCR of the sitagliptin and metformin hydrochloride, respectively. It is noteworthy that these two models were successfully and effectively used with the commercial pharmaceutical formulations. Finally, the statistical comparison revealed no significant differences with the results of the HPLC reference method. The proposed method is dependable to be adopted as an alternative analytical method in the pharmaceutical industry�s quality control.
{"title":"Development and validation of a new spectrophotometric method for simultaneous determination of sitagliptin and metformin hydrochloride in tablet pharmaceutical dosage forms using chemometrics technique in comparison with HPLC","authors":"Maher Ali Almaqtari, N. Al-Odaini, F. Alarbagi, Hussein Al-Maydama","doi":"10.26850/1678-4618eqj.v48.1.2023.p72-94","DOIUrl":"https://doi.org/10.26850/1678-4618eqj.v48.1.2023.p72-94","url":null,"abstract":"A new, quick, easy, affordable and eco-friendly simultaneous spectrophotometric method for determining a combined sitagliptin and metformin hydrochloride in pharmaceutical formulations was developed and validated using two chemometrics technique. These two methods are the partial least square (PLS) and principal component regression (PCR). They do not need to do a sample preparation or separation before analysis. Various drug concentrations and instrumental spectra of 25 mixed solutions of a combination of sitagliptin and metformin hydrochloride were used for model construction in the range of 200�270 nm. The R2 values of 0.9994 and 0.9996 assigned for the PLS of the sitagliptin and metformin hydrochloride and that of 0.9987 and 0.9996 for the PCR of the sitagliptin and metformin hydrochloride, respectively. It is noteworthy that these two models were successfully and effectively used with the commercial pharmaceutical formulations. Finally, the statistical comparison revealed no significant differences with the results of the HPLC reference method. The proposed method is dependable to be adopted as an alternative analytical method in the pharmaceutical industry�s quality control.","PeriodicalId":35894,"journal":{"name":"Ecletica Quimica","volume":"57 4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87716806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.26850/1678-4618eqj.v48.1.2023.p55-71
E. A. Erazua, A. Oyebamiji, S. Akintelu, P. Adewole, Adedayo Adelakun, B. B. Adeleke
Lung carcinoma (LC) is responsible for almost one-third of all cancer fatalities worldwide. Tetrahydroquinoline is an organic molecule that is the semi-hydrogenated derivative of quinoline and could be found in several naturally occurring compounds such as flindersine, oricine etc. Some tetrahydroquinoline derivatives with pyrazole and hydrazide moieties were evaluated in silico against A549 (human lung cancer cell lines). The quantitative structural-activity relationship (QSAR) model created was statistically significant with validation metrics of R2 (0.9525), R2adj (0.9314), and CV.R (0.9719). The molecular docking analysis revealed that compound C14 demonstrated the best binding affinity towards the studied protein with binding affinity value of –10.1 kcal mol–1 (4LRM). This is in accordance with the experimental result (IC50 = 0.69). The factors observed for ADME&T correlated well with the factors observed for the referenced drug. This study indicates that compounds C1 and C9 can be further developed as anti-epidermal growth factor receptor (EGFR) compounds. Thus, our findings may open door for the design and development of library of efficient Tetrahydroquinoline-based drug-like compounds as potential anti-LC agents.
{"title":"Quantitative Structure-Activity relationship, Molecular Docking and ADMET Screening of Tetrahydroquinoline Derivatives as Anti-Small Cell Lung Cancer Agents","authors":"E. A. Erazua, A. Oyebamiji, S. Akintelu, P. Adewole, Adedayo Adelakun, B. B. Adeleke","doi":"10.26850/1678-4618eqj.v48.1.2023.p55-71","DOIUrl":"https://doi.org/10.26850/1678-4618eqj.v48.1.2023.p55-71","url":null,"abstract":"Lung carcinoma (LC) is responsible for almost one-third of all cancer fatalities worldwide. Tetrahydroquinoline is an organic molecule that is the semi-hydrogenated derivative of quinoline and could be found in several naturally occurring compounds such as flindersine, oricine etc. Some tetrahydroquinoline derivatives with pyrazole and hydrazide moieties were evaluated in silico against A549 (human lung cancer cell lines). The quantitative structural-activity relationship (QSAR) model created was statistically significant with validation metrics of R2 (0.9525), R2adj (0.9314), and CV.R (0.9719). The molecular docking analysis revealed that compound C14 demonstrated the best binding affinity towards the studied protein with binding affinity value of –10.1 kcal mol–1 (4LRM). This is in accordance with the experimental result (IC50 = 0.69). The factors observed for ADME&T correlated well with the factors observed for the referenced drug. This study indicates that compounds C1 and C9 can be further developed as anti-epidermal growth factor receptor (EGFR) compounds. Thus, our findings may open door for the design and development of library of efficient Tetrahydroquinoline-based drug-like compounds as potential anti-LC agents.","PeriodicalId":35894,"journal":{"name":"Ecletica Quimica","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88813809","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Species from the Garcinia genus (Clusiaceae family) are used in the treatment of many diseases and metabolic disorders frequently associated with the oxidative stress. The characteristic metabolites found in this genus are xanthones and benzophenones, which have antioxidant properties, among relevant biological potentials. This review provides a specific vision about antioxidant activity of Garcinia species, reporting in vitro and in vivo assays, described from the last five years. The research about antioxidant properties of Garcinia species and their constituents can be directed in the development of new medicines and drugs.
{"title":"Antioxidant property of secondary metabolites from Garcinia genus: A short review","authors":"Elton Kazmierczak, C�ssia Gon�alves Magalh�es, Romaiana Picada Pereira","doi":"10.26850/1678-4618eqj.v48.1.2023.p41-54","DOIUrl":"https://doi.org/10.26850/1678-4618eqj.v48.1.2023.p41-54","url":null,"abstract":"Species from the Garcinia genus (Clusiaceae family) are used in the treatment of many diseases and metabolic disorders frequently associated with the oxidative stress. The characteristic metabolites found in this genus are xanthones and benzophenones, which have antioxidant properties, among relevant biological potentials. This review provides a specific vision about antioxidant activity of Garcinia species, reporting in vitro and in vivo assays, described from the last five years. The research about antioxidant properties of Garcinia species and their constituents can be directed in the development of new medicines and drugs.","PeriodicalId":35894,"journal":{"name":"Ecletica Quimica","volume":"108 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87611991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-10-05DOI: 10.26850/1678-4618eqj.v15.1.1990.p9-15
Luiz Antonio Andrade de Oliveira
.
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{"title":"Kinetics and mechanisms of the reaction between the pentaamine(dimethylsulfoxide)cobalt(III) complex and the reducing agents chromium(III), vanadium(II) and europium(II) in aqueous solution","authors":"Luiz Antonio Andrade de Oliveira","doi":"10.26850/1678-4618eqj.v15.1.1990.p9-15","DOIUrl":"https://doi.org/10.26850/1678-4618eqj.v15.1.1990.p9-15","url":null,"abstract":"<jats:p>.</jats:p>","PeriodicalId":35894,"journal":{"name":"Ecletica Quimica","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69144644","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-09-13DOI: 10.26850/1678-4618eqj.v21.1.1996.p61-69
Assunta Maria Marques da Silva
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{"title":"Determinação de boro em fertilizantes pela colorimetria de azometina-H modificada","authors":"Assunta Maria Marques da Silva","doi":"10.26850/1678-4618eqj.v21.1.1996.p61-69","DOIUrl":"https://doi.org/10.26850/1678-4618eqj.v21.1.1996.p61-69","url":null,"abstract":"<jats:p>.</jats:p>","PeriodicalId":35894,"journal":{"name":"Ecletica Quimica","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69144319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-09-13DOI: 10.26850/1678-4618eqj.v21.1.1996.p97-102
Ivonete Marcanti Contato
.
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{"title":"Studies of adsorptive interaction between Aspergillus niger and the reactive azo dye procion blue MX-G","authors":"Ivonete Marcanti Contato","doi":"10.26850/1678-4618eqj.v21.1.1996.p97-102","DOIUrl":"https://doi.org/10.26850/1678-4618eqj.v21.1.1996.p97-102","url":null,"abstract":"<jats:p>.</jats:p>","PeriodicalId":35894,"journal":{"name":"Ecletica Quimica","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69144327","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-09-13DOI: 10.26850/1678-4618eqj.v21.1.1996.p49-60
Ademir Geraldo Cavalari Costalonga
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{"title":"Preparação, caracterização e estudo do comportamento térmico dos selanatos duplos de cálcio, de berílio e de amônio","authors":"Ademir Geraldo Cavalari Costalonga","doi":"10.26850/1678-4618eqj.v21.1.1996.p49-60","DOIUrl":"https://doi.org/10.26850/1678-4618eqj.v21.1.1996.p49-60","url":null,"abstract":"<jats:p>.</jats:p>","PeriodicalId":35894,"journal":{"name":"Ecletica Quimica","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69144784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-07DOI: 10.26850/1678-4618EQJ.V10.1.1986.P1-6
J. Gastmans, D. F. Gastmans, J. M. Lopes
{"title":"L'importance des methodes autoconsistentes dans la definition d'un modele de l'aromaticite chimique","authors":"J. Gastmans, D. F. Gastmans, J. M. Lopes","doi":"10.26850/1678-4618EQJ.V10.1.1986.P1-6","DOIUrl":"https://doi.org/10.26850/1678-4618EQJ.V10.1.1986.P1-6","url":null,"abstract":"","PeriodicalId":35894,"journal":{"name":"Ecletica Quimica","volume":"10 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2018-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41919973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-07DOI: 10.26850/1678-4618eqj.v7.1.1982.p59-63
Cirano Rocha Leite
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{"title":"Algumas estruturas internas do diamante, ao redor de inclusões minerais","authors":"Cirano Rocha Leite","doi":"10.26850/1678-4618eqj.v7.1.1982.p59-63","DOIUrl":"https://doi.org/10.26850/1678-4618eqj.v7.1.1982.p59-63","url":null,"abstract":"<jats:p>.</jats:p>","PeriodicalId":35894,"journal":{"name":"Ecletica Quimica","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69144540","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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