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Campbell JM, Grinias K, Facchine K, Igne B, Clawson J, Peterson J, Wolters A, Barry J, Watson S, Leach K. Analysis of unstable degradation impurities of a benzodiazepine and their quantification without isolation using multiple linear regression. J Pharm Biomed Anal 2019; 167:1-6. [PMID: 30731352 DOI: 10.1016/j.jpba.2019.01.028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Revised: 01/14/2019] [Accepted: 01/16/2019] [Indexed: 11/19/2022]
Abstract
This manuscript presents a novel methodology for calculating the relative response factors (RRFs) of unstable degradation impurities of molibresib (1). The degradation impurities were observed by HPLC during stress testing and were accompanied by large mass balance deficits. However, the impurities could not be isolated for traditional RRF determination due to their instability. The RRFs of two degradation impurities were determined without isolation by multiple linear regression analysis of HPLC-UV data. The results permitted accurate quantification of the degradants. The benefits and drawbacks of the approach are discussed, including suggested validation acceptance criteria.
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Affiliation(s)
- John M Campbell
- Pharma Research & Development, GlaxoSmithKline, Upper Providence, PA, USA.
| | - Kaitie Grinias
- Pharma Research & Development, GlaxoSmithKline, Upper Providence, PA, USA
| | - Kevin Facchine
- Pharma Research & Development, GlaxoSmithKline, Upper Providence, PA, USA
| | - Benoît Igne
- Pharma Research & Development, GlaxoSmithKline, Upper Providence, PA, USA
| | - Jacalyn Clawson
- Pharma Research & Development, GlaxoSmithKline, Upper Providence, PA, USA
| | - John Peterson
- Pharma Research & Development, GlaxoSmithKline, Upper Providence, PA, USA
| | - Andy Wolters
- Pharma Research & Development, GlaxoSmithKline, Upper Providence, PA, USA
| | - Jeremy Barry
- Pharma Research & Development, GlaxoSmithKline, Upper Providence, PA, USA
| | - Simon Watson
- Pharma Research & Development, GlaxoSmithKline, Stevenage, Hertfordshire, UK
| | - Kevin Leach
- Pharma Research & Development, GlaxoSmithKline, Upper Providence, PA, USA
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2
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Structural elucidation of novel degradation product of brotizolam. Bioorg Med Chem Lett 2013; 23:3515-8. [DOI: 10.1016/j.bmcl.2013.04.044] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2013] [Revised: 04/08/2013] [Accepted: 04/17/2013] [Indexed: 11/21/2022]
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3
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Legouin B, Burgot JL. Isolation and structural data of the opened ring derivative of a 1,2,4-triazolothieno-1,4-diazepine. J Heterocycl Chem 2009. [DOI: 10.1002/jhet.5570370121] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Liu X, Liu Y, Ding Z, Wang Q, Zhang C. The crystal structure of 9-chloro-4,5-dihydro-2-ethyl-1-(2,4,6-trichlorophenyl)-1 H-1,2,4-triazolo[3,2- d][1,5]-benzoxazepinium hexachloroantimonate. J Heterocycl Chem 2000. [DOI: 10.1002/jhet.5570370211] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Arenaza M, Berrueta L, Gallo B, Vicente F, Escobal A, Iriondo C. Separation and structural elucidation of the hydrolysis compounds of loprazolam. J Chromatogr A 1996. [DOI: 10.1016/0021-9673(95)00592-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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