4-Substituted derivatives of pyrazolo [1,5-a]-quinoxaline-3-carb

4-Substituted enkephalin derivatives

4-Substituted phenyl 4'-(5-n-alkyl-1,3-dioxan-2-yl)benzoates

4-Substituted-1-piperidinesulfonamides

4-Substituted-2, 3-dihydro-1-benzoxepin-3, 5-diones and tautomer

4-Substituted-2,3-dihydro-1-benzoxepin-3,5-diones and tautomers

4-Substituted-2-oxoazetidine compounds

4-Substituted-2-oxoazetidine compounds and processes for the pre

4-Substituted-5-cyano-7-nitro-2-(.alpha.,.alpha.-difluoroalkyl)b

4-Sulfanilamidothiazole

4-Sulphomethyl substituted hydroxypyridone azo dyestuffs

4-Tert-butyl-N-sec-butyl-2,6-dinitroaniline

4-Tert.-butoxyphenylglycinonitrile and the preparation of D-(-)-

4-Thenyl-or furyl-6-amino-3,4-dihydropyrid-2-one-3,5-dicarboxyli

4-Thioxo-2-azetidinones

4-Tricyclo[5,2,1,0.sup.2,6 ]decyl-8-butanal

4-Trifluoromethylphenoxy-benzaldoximes

4-Trifluoromethylphenylhydrazinomethylene-malononitriles

4-Unsubstituted azetidinone derivatives and process for preparat

4-Ureido-2-acyl phenoxypropanolamine