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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">zhps</journal-id><journal-title-group><journal-title xml:lang="ru">Журнал прикладной спектроскопии</journal-title><trans-title-group xml:lang="en"><trans-title>Zhurnal Prikladnoii Spektroskopii</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0514-7506</issn><publisher><publisher-name>B. I. Stepanov Institute of Physics of the National Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">zhps-1369</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>АННОТАЦИИ АНГЛОЯЗЫЧНЫХ СТАТЕЙ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ABSTRACTS ENGLISH-LANGUAGE ARTICLES</subject></subj-group></article-categories><title-group><article-title>Методы производной спектрофотометрии для определения тозилата валбеназина в нерасфасованном виде и фармацевтических составах</article-title><trans-title-group xml:lang="en"><trans-title>Stability Indicating Derivative Spectrophotometric Methods for Determination of Valbenazine Tosylate in Bulk and in Formulation</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Gupta</surname><given-names>T.</given-names></name><name name-style="western" xml:lang="en"><surname>Gupta</surname><given-names>T.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Чандигарх</p></bio><bio xml:lang="en"><p>Chandigarh</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Bali</surname><given-names>A.</given-names></name><name name-style="western" xml:lang="en"><surname>Bali</surname><given-names>A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Чандигарх</p></bio><bio xml:lang="en"><p>Chandigarh</p></bio><email xlink:type="simple">alka.bali@rediffmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Mahesh</surname><given-names>M.</given-names></name><name name-style="western" xml:lang="en"><surname>Mahesh</surname><given-names>M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Чандигарх</p></bio><bio xml:lang="en"><p>Chandigarh</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт фармацевтических наук Центра перспективных исследований UGC, Панджабский университет</institution></aff><aff xml:lang="en"><institution>University Institute of Pharmaceutical Sciences, UGC Center of Advanced Study, Panjab University</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>28</day><month>08</month><year>2023</year></pub-date><volume>90</volume><issue>4</issue><fpage>658</fpage><lpage>658</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Gupta T., Bali A., Mahesh M., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Gupta T., Bali A., Mahesh M.</copyright-holder><copyright-holder xml:lang="en">Gupta T., Bali A., Mahesh M.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://zhps.ejournal.by/jour/article/view/1369">https://zhps.ejournal.by/jour/article/view/1369</self-uri><abstract><p>Валбеназина тозилат, производное бензохинолизидина, — высокоселективный ингибитор везикулярного переноса моноаминов 2 (VMAT2), первый и единственный препарат, одобренный FDA для лечения поздней дискинезии. Для оценки валбеназина в нерасфасованном виде и фармацевтических составах разработаны чувствительные и экономически эффективные УФ-спектрофотометрические методы производной первого порядка. Предварительное спектрофотометрическое определение препарата проводили в ацетонитриле и в 0.1 N HCl с 19 вариациями параметров для двух методов. Выполненная оценка стабильности выбранных вариантов методов, в том числе “пик–ноль” (P–0) и “пик–пик” (P–P), указывает на их потенциал для растворов, подвергшихся принудительному разложению. Разработанные методы проверены на линейность, точность, прецизионность, надежность. Линейность в диапазоне концентраций 5.0–70.0 мкг/мл с коэффициентом корреляции r2 = 0.9998. Пределы обнаружения для предложенных вариантов метода 0.89—2.75 мкг/мл, пределы количественного определения 1.19—4.32 мкг/мл. Методы применены для оценки лекарственного средства в форме капсул, поступающих на рынок, процент извлечения от 94 до 95%.</p></abstract><trans-abstract xml:lang="en"><p>Valbenazine tosylate, a benzoquinolizidine derivative, is a highly selective vesicular monoamine transporter 2 (VMAT2) inhibitor. It is the first and the only drug approved by the FDA for the treatment of tardive dyskinesia. Rapid, sensitive, and cost-effective first-order derivative UV spectrophotometric methods have been developed for the estimation of valbenazine in bulk and in its marketed formulation. Preliminary spectrophotometric determination of the drug was carried out in acetonitrile and in 0.1 N HCl with a total of 19 parametric variations for the two methods. The selected three-method variants employing peak–zero (P–0) and peak–peak (P–P) techniques were assessed for their stability, indicating potential in force degraded solutions of the drug. The developed methods were validated with respect to linearity, accuracy, precision, and robustness. Linearity was observed within the concentration range 5.0–70.0 μg/mL with an excellent correlation coefficient (r2) of 0.9998. The limits of assay detection values for the proposed method variants were found to range from 0.89 to 2.75 μg/mL, and quantitation limits ranged from 1.19 to 4.32 μg/mL. The proposed methods were applied for the determination of the drug in its marketed capsule formulation, and percentage recovery was found to range from 94 to 95%. </p></trans-abstract><kwd-group xml:lang="ru"><kwd>тозилат валбеназина</kwd><kwd>спектрофотометрический метод</kwd><kwd>коэффициент корреляции</kwd></kwd-group><kwd-group xml:lang="en"><kwd>valbenazine tosylate</kwd><kwd>spectrophotometric method</kwd><kwd>correlation coefficient</kwd></kwd-group><funding-group><funding-statement xml:lang="en">This work was supported by the University Grants Commission (UGC), New Delhi, India (Grant No. 36/N/296).</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">https://pubchem.ncbi.nlm.nih.gov/compound/92042922#section=Top (Last accessed: January 2022).</mixed-citation><mixed-citation xml:lang="en">https://pubchem.ncbi.nlm.nih.gov/compound/92042922#section=Top (Last accessed: January 2022).</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">https://www.accessdata.fda.gov/drugsatfda_docs/label/2017/2092 41lbl.pdf (Last accessed: 24 February 2022).</mixed-citation><mixed-citation xml:lang="en">https://www.accessdata.fda.gov/drugsatfda_docs/label/2017/2092 41lbl.pdf (Last accessed: 24 February 2022).</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">H. 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