of Piper methysticum was found to inhibit melanogenesis in MSH-activated B16 melanoma cells. Flavokawains B and C were isolated from this extract based on their anti-melanogenesis activity and found to inhibit melanogenesis with IC50 values of 7.7 μM and 6.9 μM, respectively. Flavokawain analogs were synthesized through a Claisen–Schmidt condensation of their corresponding acetophenones and benzaldehydes
发现胡椒的根的
乙醇提取物抑制了MSH激活的B16
黑色素瘤细胞中的
黑色素生成。基于它们的抗黑素生成活性,从该
提取物中分离出黄
酮类固醇B和C,发现抑制黑素生成的IC 50值分别为7.7μM和6.9μM 。Flavokawain类似物是通过其相应的
苯乙酮和
苯甲醛的Claisen-Schmidt缩合反应合成的,并根据其
酪氨酸酶抑制和抗
黑色素生成活性进行了评估。在使用MSH激活的B16
黑色素瘤细胞的
黑色素生成抑制试验中,化合物1b最有效,IC 50值为2.3μM。