The invention is drawn to 7-substituted-9-(substituted amino)-6-demethyl-6-deoxytetracycline compounds of the formula ##STR1## wherein R, X, R.sup.5 and R.sup.6 are defined in the specification. The compounds of the invention are useful as broad spectrum antibiotics.
                            本发明涉及式子为##STR1##的7-取代-9-(取代
氨基)-6-去甲基-6-脱氧
四环素化合物,其中R,X,R.sup.5和R.sup.6在规范中有定义。本发明的化合物可用作广谱抗生素。