Esters and ethers of 16-methyl-9.alpha.-halocorticosteroids

Tetracycline derivatives

Doxycycline alkali metaphosphate complexes

Doxycycline alkali metal polyphosphate complex with improved pharmacological properties

Separation of .alpha.-6-deoxytetracyclines from reaction mixtures

Betamethasone

Biological transformation of anhydrotetracyclines to 6-deoxytetracyclines

Corticosteroid 21-sulfate and phosphate esters

alpha.-6-Deoxytetracyclines from anhydrotetracyclines

Gently and selectively acting palladium on carbon supports as hydrogenation catalysts

16.beta.-Methyl-17.alpha.-hydroxypregna-1,4,9(11)-triene-3,20-dione

16.beta.-Methyl-17.alpha.-hydroxypregna-1,4,9(11)-triene-3,20-dione and analogs