4-Amino-6-(pyridinyl)-3(2H)-pyridazinones and their use as cardi

4-Aminopyridines and medicaments containing the same

4-Aminoquinazoline cardiac stimulants

4-Aminoquinazoline derivatives having fungicidal, anti-insect an

4-Aminoquinoline derivatives, useful as anti-inflammatory agents

4-Androsten-3-ones and process for the preparation thereof

4-Anilinoquinazoline compounds and pharmaceutical compositions t

4-Aryl-4-aryloxypiperidines

4-Aryl-5-piperazinoalkyl-1,3-dioxol-2-ones, and compositions

4-Aryloxy-1,2,3,4-tetrahydroisoquinolines

4-Aza-17.beta.-substituted-5.alpha.-androstan-3-one-reductase in

4-Carbethoxy-carbonilamino-pyrimidines and a process for their p

4-Halo etianic acids and derivatives thereof

4-Halo steroids

4-Homoisotwistane-aminoacid amides

4-Hydroxy-2-quinolinone-3-carboxylic acids and salts thereof

4-Hydroxy-2H-1,2-benzothiazine-3-carboxamide-1,1-dioxides and sa

4-Hydroxy-2H-naphtho[2,1-e]-1,2-thiazine-3-carboxamide-1,1-dioxi

4-Hydroxy-2H-[1]-benzothieno [2,3-e]-1,2-thiazine-3-carboxamide-

4-Hydroxy-3-nitro-pyrido[2,3-B]pyridine-2(1H)-ones