4(1H)-pyrimidinones

4(2' Isoquinolin-1-one)piperidines

4(3H)-Quinazolinone derivatives, process for production thereof,

4(or 3)-(3,4-Dihydroxyphenyl)pyridines, their cardiotonic use an

4,1-Benzoxazonine derivatives and process therefor

4,4-Diphenylcycloalkylpiperidines and psychotropic compositions

4,5,6,7-Tetrahydro-thieno[2,3-c]-and [3,2-c]-pyridines, and ther

4,5-Deoxymaytansinoids, their use and pharmaceutical composition

4,5-Dihydro-2-methyl-6-(4-pyridinyl)-3(2H)-pyridazinone and its

4,5-Dihydro-4,5-dioxo-1H-1-benzopyrano (2,3-B)-pyridine-3-carbox

4,5-Dihydro-4-oxo-1,3-dith iolo(4,5-D)pyridazine-2-ylidene-propa

4,5-Dihydro-5-oxopyrazolo[1,5-A]quinazoline-3-carboxamides

4,5-Dihydro-5-oxopyrazolo[1,5-a]quinazoline-3-carboxylic acid de

4,5-Dihydro-6-(4-pyridinyl)-3-pyridazinol and salts, their prepa

4,5-Dihydroimidazo-[1,2-a]quinoxaline-2-carboxylic acids and the

4,6-Diaryl-pyrimidin-2(1H)-ones as tranquilizers

4,7-Dihydro-4,7-dioxi-1H-cyclohepta[b]pyridine derivatives

4,9-Dihydro-4,9-dioxo-1H-cyclohepta[b]pyridine derivatives

4,9-Dihydro-9-oxo-N-1H-tetrazol-5-yl-pyrazolo[5,1-b]-quinazolin

4-(((Heterocyclo)thio)methyl)benzoic acids, esters and amides an