Pregnane-21-oic acids of the formula ##SPC1## Wherein X is a hydrogen atom, a fluorine atom, or methyl; Y is a hydrogen atom, a fluorine atom, or a chlorine atom; Z is methylene, carbonyl, .beta.-hydroxymethylene, .beta.-acyloxymethylene or when Y is a chlorine atom, .beta.-fluoromethylene or .beta.-chloromethylene; V is methylene, ethylidene or vinylidene; R.sub.1 is a hydrogen atom or acyl, and physiologically acceptable salts thereof with bases and physiologically acceptable 21-esters thereof, possess topical anti-inflammatory activity with substantially no systemic activity.
孕烷-21-
油酸的结构式为##
SPC1## 其中X为氢原子、
氟原子或甲基;Y为氢原子、
氟原子或
氯原子;Z为亚甲基、羰基、β-羟甲基、β-酰氧基甲基,或当Y为
氯原子时,β-
氟甲基或β-
氯甲基;V为亚甲基、乙亚甲基或
乙烯亚甲基;R.sub.1为氢原子或酰基,以及其与碱形成的生理上可接受的盐和生理上可接受的21-酯,具有局部抗炎活性,几乎没有系统作用。