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

Betamethasone

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

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

Complexes of chloramphenicol palmitate with calcium pantothenate

Complex from chloramphenicol palmitate and calcium pantothenate

Fermentation production of tetracycline

Tetracycline-N,N'-dibenzylideneethylenediamine complexes for use in isolating tetracyclines

Preparation of N,N'-dibenzylethylenediamine tetracyclines

Addition compounds of chloramphenicol palmitate and calcium pantothenate

Tetracycline hexametaphosphate

Tetracycline phosphate complexes