4-Acetoxy-2&agr;-benzoyloxy-5&bgr;,20-epoxy-1&bgr;,7&bgr;,10...

4-acylamino-2,2,6,6-tetramethylpiperidine derivatives and...

4-acylaminophenylacetylenealcohol compounds

4-alkanoyl-3-thiazolines and their use as odorants and...

4-Alkanoylimidazol-2-ones

4-alkenyl-and 4-alkynyloxindoles

4-alkenyl-and 4-alkynyloxindoles

4-Alkenylaminocarbonyl- and 4-alkinylaminocarbonyl-1-phenyl-5-py

4-Alkoxy-1,3-dioxane-5-carbonitriles and process for preparing t

4-alkoxy-2, 6-di-t-butylphenol derivatives

4-alkoxy-3-pyrrolin-2-on-1-yl acetic acid alkyl esters

4-alkyl-1,2,4-4H-triazole derivatives

4-alkyl-1,4-dihydropyridines with PAF-antagonist activity

4-amino substituted-2-substituted-1,2,3,4-tetrahydroquinolines

4-amino-.DELTA..sup.4 -steroids and their use as 5.alpha.-reduct

4-amino-2,3-di-substituted-1-(mono- or trichlorophenyl)-3-pyrazo

4-amino-2-methyl-3-phenyl-1-(2,4,6-trichlorophenyl)-3-pyrazolin-

4-amino-3-acylnaphthyridine derivatives

4-amino-3-hydroxy-phthalide, and a process for its preparation

4-amino-3-hydroxy-phthalimidine, and a process for the preparati