View Patent / 1973 16.beta.-Methyl-17.alpha.-hydroxypregna-1,4,9(11)-triene-3,20-dione and analogs GB 1397267
View Patent / 1973 21-Sulfuric acid or 21-orthophosphoric acid ester sodium salts of prednisolone or 9.alpha.-fluoro-16.beta.-methylprednisolone DE 1793707
View Patent / 1973 Catalytic dehalogenation, alone or with simultaneous reduction, of 11a-halo-6-deoxy-6-demethyl, 6-methylenetetracyclines by hydrazine GB 1360006