New tetracyclo compounds of the formula: ##STR1## in which R.sup.1 is formyl, protected formyl, hydroxymethyl, protected hydroxymethyl, arylaminomethyl, carboxy, protected carboxy or substituted iminomethyl, R.sup.2 is hydroxy, alkoxy or protected hydroxy, R.sup.3 is hydrogen and R.sup.4 is methyl, hydroxymethyl or protected hydroxymethyl, or R.sup.3 and R.sup.4 are combined together to form methylene or oxo, R.sup.5 is hydroxy, alkoxy or protected hydroxy, and R.sup.6 is hydrogen, imino-protective group or alkyl, and pharmaceutically acceptable salts thereof, which have pharmacological activities such as antitumor activity, antimicrobial activity, and the like, and a process for their production and a pharmaceutical composition containing the same.
新的四环四氮化合物的
化学式如下:##STR1## 其中,R.sup.1为甲酰基,保护甲酰基,羟甲基,保护羟甲基,芳基
氨甲基,羧基,保护羧基或取代
亚胺基甲基;R.sup.2为羟基,烷氧基或保护羟基;R.sup.3为氢;R.sup.4为甲基,羟甲基或保护羟甲基,或者R.sup.3和R.sup.4结合形成亚甲基或氧代亚甲基;R.sup.5为羟基,烷氧基或保护羟基;R.sup.6为氢,
亚胺保护基或烷基。这些化合物及其药物可接受的盐具有抗肿瘤活性、抗微
生物活性等药理活性。同时,还提供了其制备方法和含有该化合物的制药组合物。