title: Letter: Comparative activity of minocycline and tetracycline.
mesh_terms: D001419:Bacteria / Q000187:drug effects; D008826:Microbial Sensitivity Tests; D008911:Minocycline / Q000494:pharmacology; D011511:Proteus / Q000187:drug effects; D013329:Structure-Activity Relationship; D013752:Tetracycline / Q000494:pharmacology*
chemical_list: D013752:Tetracycline; D008911:Minocycline