{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,30]],"date-time":"2026-04-30T21:51:50Z","timestamp":1777585910211,"version":"3.51.4"},"reference-count":41,"publisher":"SAGE Publications","issue":"5","license":[{"start":{"date-parts":[[2008,4,1]],"date-time":"2008-04-01T00:00:00Z","timestamp":1207008000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Eur J Mass Spectrom (Chichester)"],"published-print":{"date-parts":[[2008,10]]},"abstract":"<jats:p>\n                    The collision-induced dissociation (CID) mass spectra were obtained for the X\n                    <jats:sup>+<\/jats:sup>\n                    -adducts (X = Na\n                    <jats:sup>+<\/jats:sup>\n                    or Li\n                    <jats:sup>+<\/jats:sup>\n                    ) of five tetracyclines, four pyrimidine and three purine derivatives and their fully D-exchanged species in which the labile hydrogens were replaced by deuterium by either gas- or liquid-phase exchange. The CID spectra were obtained for [M + Na]\n                    <jats:sup>+<\/jats:sup>\n                    and [M + Li]\n                    <jats:sup>+<\/jats:sup>\n                    and the exchanged analogs, [M(D) + Na]\n                    <jats:sup>+<\/jats:sup>\n                    and [M(D) + Li]\n                    <jats:sup>+<\/jats:sup>\n                    , and compositions of product ions and mechanisms of decomposition were determined by comparison of the MS\n                    <jats:sup>n<\/jats:sup>\n                    spectra of the undeuterated and deuterated species. Metal ions are bound to the base of purine and pyrimidine anti-viral agents and dissociate primarily to give the metal complexes of the base [B + X]\n                    <jats:sup>+<\/jats:sup>\n                    . For vidarabine monophosphate, however, the metal ions are bound to the phosphate group, resulting in unique and characteristic cleavage reactions not observed in the uncomplexed system and dissociate through the loss of phosphate and\/or a phosphate metal ion complex. The [B + X]\n                    <jats:sup>+<\/jats:sup>\n                    of these anti-viral agents are relatively stable and show little or no fragmentation compared to [B + H]\n                    <jats:sup>+<\/jats:sup>\n                    . The CID of [B + X]\n                    <jats:sup>+<\/jats:sup>\n                    of guanine derivatives occurs mainly through elimination of NH\n                    <jats:sub>3<\/jats:sub>\n                    and that of trifluoromethyl uracil dissociates primarily through the loss of HF. For tetracyclines, metal ions are bound to ring A at the tricarbonylmethyl group and dissociate initially by the loss of NH\n                    <jats:sub>3<\/jats:sub>\n                    \/ND\n                    <jats:sub>3<\/jats:sub>\n                    from [M\n                    <jats:sub>H<\/jats:sub>\n                    + X]\n                    <jats:sup>+<\/jats:sup>\n                    and [M\n                    <jats:sub>D<\/jats:sub>\n                    \u2013 X]\n                    <jats:sup>+<\/jats:sup>\n                    . The CID spectra of [M + X]\n                    <jats:sup>+<\/jats:sup>\n                    of tetracyclines are somewhat similar to those of [M + H]\n                    <jats:sup>+<\/jats:sup>\n                    . The dominant fragments from the metal complexes of these compounds are charge remote decompositions involving molecular rearrangements and the loss of small stable molecules. Additionally, tetracyclines and the anti-viral agents show more selectivity towards the Li\n                    <jats:sup>+<\/jats:sup>\n                    ion than the corresponding complexes with Na\n                    <jats:sup>+<\/jats:sup>\n                    or K\n                    <jats:sup>+<\/jats:sup>\n                    .\n                  <\/jats:p>","DOI":"10.1255\/ejms.933","type":"journal-article","created":{"date-parts":[[2008,10,20]],"date-time":"2008-10-20T06:34:56Z","timestamp":1224484496000},"page":"281-297","source":"Crossref","is-referenced-by-count":3,"title":["Collision-Induced Dissociation Studies of Alkali Metal Adducts of Tetracyclines and Anti-Viral Agents by Electrospray Ionization, Hydrogen\/Deuterium Exchange and Multiple Stage Mass Spectrometry"],"prefix":"10.1177","volume":"14","author":[{"given":"Amin","family":"Kamel","sequence":"first","affiliation":[{"name":"Department of Exploratory Medicinal Sciences, Pfizer Global Research and Development, Groton Laboratories, Eastern Point Road, Groton, Connecticut 06340, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Burnaby","family":"Munson","sequence":"additional","affiliation":[{"name":"Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2008,4,1]]},"reference":[{"key":"bibr1-ejms.933","doi-asserted-by":"publisher","DOI":"10.1021\/ja9613421"},{"key":"bibr2-ejms.933","volume-title":"Principals of bioinorganic chemistry","author":"Lippard S.J.","year":"1994"},{"key":"bibr3-ejms.933","unstructured":"Loeb L.A., Zakour A.R., in Nucleic acid\u2013metal ion interactions, Ed by Spiro T.G., John Wiley & Sons Inc., New York, USA, pp 115\u2013144 (1980)."},{"key":"bibr4-ejms.933","doi-asserted-by":"publisher","DOI":"10.1002\/jps.2600541006"},{"key":"bibr5-ejms.933","doi-asserted-by":"publisher","DOI":"10.1021\/jm00295a024"},{"key":"bibr6-ejms.933","doi-asserted-by":"publisher","DOI":"10.1002\/(SICI)1096-9888(199704)32:4<432::AID-JMS497>3.0.CO;2-A"},{"key":"bibr7-ejms.933","doi-asserted-by":"publisher","DOI":"10.1074\/jbc.M008005200"},{"key":"bibr8-ejms.933","doi-asserted-by":"publisher","DOI":"10.1021\/ac0010476"},{"key":"bibr9-ejms.933","doi-asserted-by":"publisher","DOI":"10.1016\/S1044-0305(00)00166-5"},{"key":"bibr10-ejms.933","doi-asserted-by":"publisher","DOI":"10.1002\/(SICI)1097-0231(19990630)13:12<1098::AID-RCM618>3.0.CO;2-Y"},{"key":"bibr11-ejms.933","doi-asserted-by":"publisher","DOI":"10.1002\/(SICI)1096-9888(199808)33:8<721::AID-JMS686>3.0.CO;2-K"},{"key":"bibr12-ejms.933","first-page":"385","volume-title":"Electrospray ionization mass spectrometry","author":"Loo J.A.","year":"1997"},{"key":"bibr13-ejms.933","doi-asserted-by":"publisher","DOI":"10.1093\/nar\/29.21.e103"},{"key":"bibr14-ejms.933","unstructured":"Kamel A., Munson B. \u201cCollision induced dissociation studies of alkali metal adducts of tetracyclines and anti-viral agents by electrospray ionization, gas phase H\/D exchange and multiple stage mass spectrometry\u201d The 51st ASMS Conference on Mass Spectrometry and allied topics, Montreal, Quebec, Canada (2003)."},{"key":"bibr15-ejms.933","doi-asserted-by":"publisher","DOI":"10.1139\/v91-123"},{"key":"bibr16-ejms.933","doi-asserted-by":"publisher","DOI":"10.1016\/S1044-0305(98)00078-6"},{"key":"bibr17-ejms.933","doi-asserted-by":"publisher","DOI":"10.1021\/ja00421a049"},{"key":"bibr18-ejms.933","doi-asserted-by":"publisher","DOI":"10.1021\/ja00854a052"},{"key":"bibr19-ejms.933","doi-asserted-by":"publisher","DOI":"10.1021\/ja00842a015"},{"key":"bibr20-ejms.933","doi-asserted-by":"publisher","DOI":"10.1016\/0076-6879(90)93424-J"},{"key":"bibr21-ejms.933","doi-asserted-by":"publisher","DOI":"10.1016\/S0168-1176(97)83245-4"},{"key":"bibr22-ejms.933","doi-asserted-by":"publisher","DOI":"10.1021\/ac961030g"},{"key":"bibr23-ejms.933","doi-asserted-by":"publisher","DOI":"10.1139\/v95-219"},{"key":"bibr24-ejms.933","doi-asserted-by":"publisher","DOI":"10.1016\/1044-0305(95)00324-7"},{"key":"bibr25-ejms.933","doi-asserted-by":"publisher","DOI":"10.1016\/1044-0305(94)00092-E"},{"key":"bibr26-ejms.933","doi-asserted-by":"publisher","DOI":"10.1002\/rcm.1290041018"},{"key":"bibr27-ejms.933","doi-asserted-by":"publisher","DOI":"10.1016\/0168-1176(92)87011-3"},{"key":"bibr28-ejms.933","first-page":"1","volume":"24","author":"Nibbering N.M.M.","year":"1988","journal-title":"Adv. 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