the hydrochlorides from tetracycline and six tetracycline derivatives -- 7-dimethylamino-6-des-methyl-6-desoxytetracycline [ minocycline ] , 7-chlorotetracycline [ chlorotetracycline ] , 7-chloro-anhydrotetracycline [ anhydrochlorotetracycline , 7-chloro-6-desmethyltetracycline [ demethylchlorotetracycline ] , 5-hydroxytetracycline [ oxytetracycline ] and 6-desoxy-5-hydroxytetracycline [ doxycycline ] -- were reacted with different amounts of sodium nitrite at 37 degrees c for two hours in aqueous buffer solutions at ph 2 and 4 .
C0546879
hydrochlorides
C0039644
tetracycline