Compounds of formula (I): ##STR1## (in which: R.sup.1 is a hydrogen atom, an unsubstituted alkyl group, an aryl-substituted alkyl group or a heterocyclic-substituted alkyl group; R.sup.2 is an aryl-substituted alkyl group, a heterocyclic-substituted alkyl group or a diarylamino group; R.sup.3 is a hydrogen atom, an unsubstituted alkyl group, an aryl-substituted alkyl group or an alkenyl group having from 3 to 6 carbon atoms; and each of the bonds represented by .alpha.-.beta. and .gamma.-.delta. is a carbon-carbon single bond or a carbon-carbon double bond;) and pharmaceutically acceptable salts and esters thereof are useful for the treatment and prophylaxis of prostatic hypertrophy. We also provide processes for their preparation.
式(I)的化合物:##STR1## (其中:R.sup.1是氢原子,未取代烷基,芳基取代的烷基或杂环取代的烷基;R.sup.2是芳基取代的烷基,杂环取代的烷基或二芳基
氨基基团;R.sup.3是氢原子,未取代烷基,芳基取代的烷基或具有3至6个碳原子的烯基基团;而α-β和γ-δ所代表的键均为碳-碳单键或碳-碳双键;)及其药学上可接受的盐和酯对于前列腺肥大的治疗和预防是有用的。我们还提供它们的制备过程。