title: Pyrido[2,3-d]pyrimidine antibacterial agents. I. 8-alkyl-5,8-dihydro-5-oxopyrido[2,3-d]-pyrimidine-6-carboxylic acids and related compounds.
mesh_terms: D000900:Anti-Bacterial Agents / Q000138:chemical synthesis* / Q000494:pharmacology; D055598:Chemical Phenomena; D002621:Chemistry; D004926:Escherichia coli / Q000187:drug effects; D011728:Pyridones / Q000138:chemical synthesis* / Q000494:pharmacology; D011743:Pyrimidines / Q000138:chemical synthesis* / Q000494:pharmacology; D013210:Staphylococcus / Q000187:drug effects
chemical_list: D000900:Anti-Bacterial Agents; D011728:Pyridones; D011743:Pyrimidines