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
化学式为:##STR1## 其中R.sup.1为甲酰基,保护的甲酰基,羟甲基,保护的羟甲基,芳基
氨甲基,羧基,保护的羧基或取代的
亚胺甲基,R.sup.2为羟基,烷氧基或保护的羟基,R.sup.3为氢,R.sup.4为甲基,羟甲基或保护的羟甲基,或R.sup.3和R.sup.4结合形成亚甲基或氧代基,R.sup.5为羟基,烷氧基或保护的羟基,R.sup.6为氢,
亚胺保护基或烷基,以及其药学上可接受的盐。该化合物具有抗肿瘤活性、抗微
生物活性等药理活性,并提供了其制备方法和包含该化合物的制药组合物。