title: Relationship between HPLC retention and biological activity of nitrogen-bridged compounds.
mesh_terms: D000818:Animals; D001681:Biological Assay; D001993:Bronchodilator Agents / Q000494:pharmacology*; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D005260:Female; D006168:Guinea Pigs; D008297:Male; D011743:Pyrimidines / Q000494:pharmacology*; D013329:Structure-Activity Relationship; D014132:Trachea / Q000187:drug effects
chemical_list: D001993:Bronchodilator Agents; D011743:Pyrimidines