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It has been shown that when using methanol containing 0.1% HCOOH as an extractant, the recovery of the substance increases in comparison with the previously developed method. In addition to this, there is no need to dilute the obtained solutions with water for the analysis of the sample by high\u2010performance liquid chromatography (HPLC) on a column with a reversed\u2010phase sorbent. By using the developed method, the stability of samples of dried rat blood spots containing camphecene in different concentrations at different temperatures was studied. It was found that while the samples were stored at room temperature, apparently, desorption of the substance occurs leading to a loss of more than 15% of its initial amount after 5\u201310\u2009days. Lowering the temperature increases the stability of samples and their storage at \u221270\u00b0C is possible for 4\u2009weeks.<\/jats:p>","DOI":"10.1002\/dta.3148","type":"journal-article","created":{"date-parts":[[2021,8,27]],"date-time":"2021-08-27T03:01:00Z","timestamp":1630033260000},"page":"1797-1802","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Stability study of the antiviral agent camphecene in dried blood spots at different temperatures"],"prefix":"10.1002","volume":"13","author":[{"given":"Alina A.","family":"Okhina","sequence":"first","affiliation":[{"name":"Department of Medicinal chemistry N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry  Novosibirsk Russia"},{"name":"V. 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