structure-activity relationships of our study into a series of thiosemicarbazone derivatives of madurahydroxylactone as potential nonsteroidal inhibitors of the enzyme estrone sulfatase. The most active compound, the cyclohexylthiosemicarbazone, was shown to be a non-competitive inhibitor with a K(i) of 0.35microM. This compound is devoid of estrogenic properties and showed low acute toxicity in the hen's
马杜拉羟基内酯(
MHL)是土壤细菌野紫菜(Nonomuria rubra)产生的次生代谢产物,属于苯并[a]
萘并
醌类。我们报告的初步结果和我们的研究成一系列的马杜拉羟基内酯的
硫半
脲衍
生物作为潜在的非甾体类
雌激素硫酸酯酶抑制剂的结构活性关系。活性最高的化合物,环己基
硫代半
脲,显示为非竞争性
抑制剂,K(i)为0.35microM。该化合物缺乏
雌激素特性,在母鸡的可育卵筛查试验中显示出较低的急性毒性。