4 -Substituted-5,7-dinitro-2-(.alpha.,.alpha.-difluoroalkyl)-ben

4 AND 5-Halo substituted 2-indanamine compounds

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-Benzoxazepines and compositions

4,1-Benzoxazonine derivatives and process therefor

4,4'-(Alkanediyl)-bis(2,2,6,6-tetraalkyl -1-oxa-4-aza-2,6-disila

4,4-Diarylpiperidine compositions and use

4,4-Dimethyl-3,5-pyrrolidinediones

4,4-Diphenylcycloalkylpiperidines and psychotropic compositions

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

4,5-Bis-(4-fluorophenyl)-1-(4-nitrobenzyl )-2-[((1,1,2,2-tetrafl

4,5-Deoxymaytansinoids, their use and pharmaceutical composition

4,5-Dichloroimidazole-2-carboxylic acid derivatives

4,5-Dihydro-2-lower alkoxycarbonylamino-4-phenylimidazoles and s

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