title: Studies on positive inotropic agents. I. Synthesis of 3,4-dihydro-6-[4-(3,4-dimethoxybenzoyl)-1-piperazinyl]-2(1H)- quinolinone and related compounds.
mesh_terms: D000818:Animals; D002316:Cardiotonic Agents / Q000138:chemical synthesis* / Q000494:pharmacology; D055598:Chemical Phenomena; D002621:Chemistry; D004285:Dogs; D006339:Heart Rate / Q000187:drug effects; D066298:In Vitro Techniques; D009200:Myocardial Contraction / Q000187:drug effects*; D011719:Pyrazines; D011804:Quinolines / Q000138:chemical synthesis* / Q000494:pharmacology
chemical_list: D002316:Cardiotonic Agents; D011719:Pyrazines; D011804:Quinolines; C041667:vesnarinone