Antibiotic tetracycline complexes

Catalytic dehalogenation, alone or with simultaneous reduction, of 11a-halo-6-deoxy-6-demethyl, 6-methylenetetracyclines by hydrazine

Methacycline and doxycycline from 11a-chloro-6-deoxy-6-demethyl-6-methylenetetracycline

Purification of 6-.alpha.-deoxy-5-hydroxytetracycline

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

Palladium-active carbon hydrogenation catalyst

9-Fluoro-16.beta.-methyl steroids

Polymetaphosphate complexes of .alpha.-6-deoxy-5-hydroxy tetracyclines

Betamethasone

Production of oxytetracycline using Streptomyces alboflavus (ATCC 15388)

Mineral hydroxy acid esters of 9.alpha.-fluoro-16-methylprednisolone

Complex from chloramphenicol palmitate and calcium pantothenate