{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,26]],"date-time":"2025-10-26T20:55:09Z","timestamp":1761512109006},"reference-count":23,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2015,9,1]],"date-time":"2015-09-01T00:00:00Z","timestamp":1441065600000},"content-version":"tdm","delay-in-days":13971,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Biol. Mass Spectrom."],"published-print":{"date-parts":[[1977,6]]},"DOI":"10.1002\/bms.1200040309","type":"journal-article","created":{"date-parts":[[2005,5,29]],"date-time":"2005-05-29T13:09:46Z","timestamp":1117372186000},"page":"172-177","source":"Crossref","is-referenced-by-count":39,"title":["High performance liquid chromatographic and mass spectrometric identification of dimethylxanthine metabolites of caffeine in human plasma"],"prefix":"10.1002","volume":"4","author":[{"given":"K. K.","family":"Midha","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"S.","family":"Sved","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"R. D.","family":"Hossie","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"I. J.","family":"McGilveray","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","reference":[{"key":"10.1002\/bms.1200040309-BIB1.1","volume":"286","author":"Schmidt","year":"1967","journal-title":"Int. Colloq. Chem. Coffee 3rd"},{"key":"10.1002\/bms.1200040309-BIB1.2","first-page":"76332x","volume":"70","year":"1969","journal-title":"Chem. Abstr."},{"key":"10.1002\/bms.1200040309-BIB2","doi-asserted-by":"crossref","first-page":"1055","DOI":"10.1007\/BF01728548","volume":"46","author":"Czok","year":"1968","journal-title":"Klin. Wochenschr."},{"key":"10.1002\/bms.1200040309-BIB3","doi-asserted-by":"crossref","first-page":"109","DOI":"10.1007\/BF02021493","volume":"9","author":"Czok","year":"1969","journal-title":"Z. Ernaehrungswiss."},{"key":"10.1002\/bms.1200040309-BIB4.1","first-page":"231","volume":"11","author":"Bertoli","year":"1968","journal-title":"Med. Nucl. Radiobiol. Lat."},{"key":"10.1002\/bms.1200040309-BIB4.2","first-page":"2022p","volume":"72","year":"1970","journal-title":"Chem. Abstr."},{"key":"10.1002\/bms.1200040309-BIB5","first-page":"185","volume":"13","author":"Sved","year":"1976","journal-title":"Res. Commun. Chem. Pathol. Pharmacol."},{"key":"10.1002\/bms.1200040309-BIB6","doi-asserted-by":"crossref","first-page":"468","DOI":"10.1016\/S0021-9673(01)96689-0","volume":"40","author":"Warren","year":"1969","journal-title":"J. Chromatogr."},{"key":"10.1002\/bms.1200040309-BIB7","first-page":"519","volume":"107","author":"Axelrod","year":"1953","journal-title":"J. Pharmacol. Exp. Therp."},{"key":"10.1002\/bms.1200040309-BIB8","doi-asserted-by":"crossref","first-page":"315","DOI":"10.1016\/S0021-9258(18)70714-X","volume":"228","author":"Cornish","year":"1957","journal-title":"J. Biol. Chem."},{"key":"10.1002\/bms.1200040309-BIB9","first-page":"402","volume":"57","author":"Schmidt","year":"1966","journal-title":"Dtsch. Z. Gesamte Gerichtl. Med."},{"key":"10.1002\/bms.1200040309-BIB10","first-page":"152","volume-title":"The Biochemistry of Foreign Compounds","author":"Parke","year":"1968","unstructured":"The Biochemistry of Foreign Compounds, p. 152, Pergamon, Oxford (1968)."},{"key":"10.1002\/bms.1200040309-BIB11","doi-asserted-by":"crossref","first-page":"909","DOI":"10.1016\/0006-2952(72)90396-6","volume":"21","author":"Burg","year":"1972","journal-title":"Biochem. Pharmacol."},{"key":"10.1002\/bms.1200040309-BIB12","doi-asserted-by":"crossref","first-page":"720","DOI":"10.1016\/0041-008X(72)90112-3","volume":"23","author":"Khanna","year":"1972","journal-title":"Toxicol. Appl. Pharmacol."},{"key":"10.1002\/bms.1200040309-BIB13","doi-asserted-by":"crossref","first-page":"953","DOI":"10.1007\/BF01930396","volume":"29","author":"Rao","year":"1973","journal-title":"Experientia"},{"key":"10.1002\/bms.1200040309-BIB14","doi-asserted-by":"crossref","first-page":"162","DOI":"10.1016\/0041-008X(74)90142-2","volume":"28","author":"Burg","year":"1974","journal-title":"Toxicol. Appl. Pharmacol."},{"key":"10.1002\/bms.1200040309-BIB15","doi-asserted-by":"crossref","first-page":"651","DOI":"10.1016\/0024-3205(75)90343-4","volume":"16","author":"Horning","year":"1975","journal-title":"Life Sci."},{"key":"10.1002\/bms.1200040309-BIB16","doi-asserted-by":"crossref","first-page":"199","DOI":"10.3109\/03602537508993756","volume":"4","author":"Rurg","year":"1975","journal-title":"Drug Metab. Rev."},{"key":"10.1002\/bms.1200040309-BIB17","doi-asserted-by":"crossref","first-page":"1774","DOI":"10.1093\/clinchem\/21.12.1774","volume":"21","author":"Sitar","year":"1975","journal-title":"Clin. Chem."},{"key":"10.1002\/bms.1200040309-BIB18","first-page":"214","volume-title":"Structure Elucidation of Natural Products by Mass Spectrometry","volume":"1","author":"Budzikiewicz","year":"1964","unstructured":"amd Structure Elucidation of Natural Products by Mass Spectrometry, Vol. 1, Pp. 214-217., Holden-Day, San Francisco (1964)."},{"key":"10.1002\/bms.1200040309-BIB19","doi-asserted-by":"crossref","first-page":"827","DOI":"10.1002\/ijch.196800102","volume":"6","author":"Lifshitz","year":"1968","journal-title":"Isr. J. Chem."},{"key":"10.1002\/bms.1200040309-BIB20","doi-asserted-by":"crossref","first-page":"1657","DOI":"10.1135\/cccc19691657","volume":"34","author":"Voticky","year":"1969","journal-title":"Collect. Czech. Chem. Commun."},{"key":"10.1002\/bms.1200040309-BIB21","doi-asserted-by":"crossref","first-page":"1822","DOI":"10.1002\/jps.2600611131","volume":"61","author":"Rao","year":"1972","journal-title":"J. Pharm. Sci."}],"container-title":["Biological Mass Spectrometry"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.wiley.com\/onlinelibrary\/tdm\/v1\/articles\/10.1002%2Fbms.1200040309","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/full\/10.1002\/bms.1200040309","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2021,7,11]],"date-time":"2021-07-11T11:06:08Z","timestamp":1626001568000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/bms.1200040309"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1977,6]]},"references-count":23,"journal-issue":{"issue":"3","published-print":{"date-parts":[[1977,6]]}},"URL":"https:\/\/doi.org\/10.1002\/bms.1200040309","relation":{},"ISSN":["1052-9306","1096-9888"],"issn-type":[{"value":"1052-9306","type":"print"},{"value":"1096-9888","type":"electronic"}],"subject":[],"published":{"date-parts":[[1977,6]]}}}