Prostanoic acid derivatives having the formula ##STR1## wherein A represents ethylene group or cis-vinylene group, R.sup.1 and R.sup.2 may be the same or different and each represents hydrogen atom or an alkyl group having 1-3 carbon atoms, R.sup.3 and R.sup.4 may be the same or different and each represents an alkyl group having 1-3 carbon atoms and R.sup.5 represents hydrogen atom or hydroxyl group and the pharmaceutically acceptable salts thereof and a process for the preparation thereof. The compounds are useful as anti-ulcerogenic or bronchodilating agents and may be prepared by oxidizing 9.xi.-hydroxy-15.xi.-protected-hydroxy-20-alkylideneprost-13(trans)-enoic acid derivatives.
具有以下式子的
前列腺酸衍
生物##STR1##其中A代表
乙烯基或顺式
乙烯基,R.sup.1和R.sup.2可以相同或不同,且每个代表氢原子或具有1-3个碳原子的烷基,R.sup.3和R.sup.4可以相同或不同,且每个代表具有1-3个碳原子的烷基,R.sup.5代表氢原子或羟基,以及其药学上可接受的盐和制备方法。这些化合物可用作抗溃疡或支气管扩张剂,并可以通过氧化9.xi.-羟基-15.xi.-保护羟基-20-烷基烯基前列腺-13(顺)-烯酸衍
生物制备。