4,4'-Methylenebis(2,6-diisobutylphenol)

4,4'-Stilbenebis-pyridooxazoles and related optical brighteners

4,4'-Thio-bis-(dialkylphenol)/formaldehyde condensates and proce

4,4'-Thiodiphenol-formaldehyde condensation products

4,4,5,5-Tetradehydro-11-deoxy-PGE.sub.1 analogs

4,4,5,5-Tetradehydro-PGE.sub.1 analogs

4,4,5,5-Tetradehydro-PGF.sub.1.sub..alpha. analogs

4,4-(O-phenylenedioxy)-2,2,6,6-tetramethyl piperidine

4,4-Diarylpiperidines and process of making the same

4,4-Substituted-oxazolinium halides

4,4-Thio-bis-(dialkylphenol)/formaldehyde condensates

4,5 Dihalopyrrol 2-yl di and tri halomethyl ketones

4,5, Substituted cyclopentane-1,3-diols

4,5,6,7-Tetra hydro-7-oxobenzo(B)thien-4-yl isocyanate and isoth

4,5,6,7-Tetrachloro-2-thio-phthalide

4,5,6,7-Tetrahydro-thieno[3,2-c]-pyridine derivatives and proces

4,5,6,7-Tetrahydrobenzimidazoles

4,5-Cis-didehydro-PGA.sub.1 analogs

4,5-Cis-didehydro-PGA.sub.1 compounds

4,5-Cis-didehydro-PGB.sub.1 compounds