桑树(Morus alba L.)根的乙醇浸膏具有抑制蛋白激酶C(PKC)的活性,从中分得的二种二苯乙烯类衍生物:oxyresveratrol和kuwanon Y对PKC的半抑制浓度IC_(50)分别为48μmol·L^(-1)和15μmol·L^(-1)。酶动力学研究显示,oxyresverat...桑树(Morus alba L.)根的乙醇浸膏具有抑制蛋白激酶C(PKC)的活性,从中分得的二种二苯乙烯类衍生物:oxyresveratrol和kuwanon Y对PKC的半抑制浓度IC_(50)分别为48μmol·L^(-1)和15μmol·L^(-1)。酶动力学研究显示,oxyresveratrol对PKC的抑制属于非竞争性抑制。展开更多
Two new sterols. 3 beta,7 alpha, 16 beta-trihydroxy-stigmast-5,22-diene 1,3 beta,7 alpha,16 beta-trihydroxy-stigmast-5-ene 2. were isolated together with two known ergosterols, ergosta-5,24(28)-diene-3 beta.7 alpha-di...Two new sterols. 3 beta,7 alpha, 16 beta-trihydroxy-stigmast-5,22-diene 1,3 beta,7 alpha,16 beta-trihydroxy-stigmast-5-ene 2. were isolated together with two known ergosterols, ergosta-5,24(28)-diene-3 beta.7 alpha-diol, ergosta-5,24(28)-diene-3 beta,7 beta,16 beta-triol from the bark of Amoora yunnanensis (H. L. Li) C. Y. Wu. Their structures were deduced on the basis of spectral data.展开更多
文摘桑树(Morus alba L.)根的乙醇浸膏具有抑制蛋白激酶C(PKC)的活性,从中分得的二种二苯乙烯类衍生物:oxyresveratrol和kuwanon Y对PKC的半抑制浓度IC_(50)分别为48μmol·L^(-1)和15μmol·L^(-1)。酶动力学研究显示,oxyresveratrol对PKC的抑制属于非竞争性抑制。
文摘Two new sterols. 3 beta,7 alpha, 16 beta-trihydroxy-stigmast-5,22-diene 1,3 beta,7 alpha,16 beta-trihydroxy-stigmast-5-ene 2. were isolated together with two known ergosterols, ergosta-5,24(28)-diene-3 beta.7 alpha-diol, ergosta-5,24(28)-diene-3 beta,7 beta,16 beta-triol from the bark of Amoora yunnanensis (H. L. Li) C. Y. Wu. Their structures were deduced on the basis of spectral data.