Antitumor agents. 89. Psychorubrin, a new cytotoxic naphthoquinone from Psychotria rubra and its structure-activity relationships
作者:Toshimitsu Hayashi、Forrest T. Smith、Kuo Hsiung Lee
DOI:10.1021/jm00394a013
日期:1987.11
A new naphthoquinone, isolated from the alcoholic extract of Psychotria rubra, exhibited significant cytotoxicity in the KB cell assay (ED50 = 3.0 micrograms/mL). Spectral data was used to assign the structure of psychorubrin as 2. Naphthoquinone derivatives 6, 8, 13, and 14 were prepared and exhibited superior cytotoxic activity to that of psychorubrin. All were potential Michael acceptors whose conjugation
从Psychotria rubra的酒精提取物中分离出的新萘醌在KB细胞测定中表现出显着的细胞毒性(ED50 = 3.0微克/ mL)。光谱数据被用于将精神尿蛋白的结构指定为2。制备了萘醌衍生物6、8、13和14,并表现出比精神尿蛋白更好的细胞毒活性。所有这些都是潜在的迈克尔受体,其结合已扩展。然而,当此类化合物中存在亲水性羟基时,观察到体外活性降低。