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pubmed-article:13862360pubmed:abstractTextThe bronchodilator activity of 47 compounds on the isolated guinea-pig tracheal ring preparation and the coronary dilator activity on the dog heart-lung preparation is described. 1,3-Disubstituted xanthines and 6-thioxanthines (theophyllines and 6-thiotheophyllines) were more active as bronchodilators and as coronary dilators than were 3,7-disubstituted 6-thioxanthines (6-thiotheobromines) or 1,3,7-trisubstituted 6-thioxanthines (6-thiocaffeines). None of the 6-thioxanthines was of any interest as a diuretic and none of the 6-thiocaffeines was of any interest as a central stimulant. Structure-activity requirements for potent bronchodilator and coronary dilator activity are discussed.lld:pubmed
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pubmed-article:13862360pubmed:authorpubmed-author:ARMITAGEA KAKlld:pubmed
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pubmed-article:13862360pubmed:authorpubmed-author:LARGEB JBJlld:pubmed
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pubmed-article:13862360pubmed:pagination196-207lld:pubmed
pubmed-article:13862360pubmed:dateRevised2009-11-18lld:pubmed
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pubmed-article:13862360pubmed:articleTitleStructure-activity relationships in a series of 6-thioxanthines with bronchodilator and coronary dilator properties.lld:pubmed
pubmed-article:13862360pubmed:publicationTypeJournal Articlelld:pubmed