作者:I. Smith-Kielland、J. Dornish、K. Malterud、G. Hvistendahl、Chr. Rømming、O. Bøckmann、P. Kolsaker、Y. Stenstrøm、A. Nordal
DOI:10.1055/s-2006-957893
日期:1996.8
Two cytotoxic triterpenes have been isolated from Euphorbia pulcherrima. Their structures and stereochemistry have been established from NMR, IR, and El-mass spectroscopy. The compounds were identified as 9,19-cycloart-23-ene-3β,25-diol and 9,19-cycloart-25-ene-3β,24-diol. Cytotoxicity evaluation was performed using Ehrlich ascites tumor cells. While cycloartenol induced no cytotoxic activity against Ehrlich ascites tumor cells, both isolated triterpenes exhibited cell inactivating effects. The IC50 is approximately 7.5 µM, while the IC90 is approximately 13.5 µM for 9,19-cycloart-25-ene-3β,24-diol. The 3β,25-diol compound is 50 % less active.
从 Euphorbia pulcherrima 中分离出了两种具有细胞毒性的三萜类化合物。通过核磁共振、红外光谱和质谱分析,确定了它们的结构和立体化学性质。这些化合物被鉴定为 9,19-环木菠萝烯-23-烯-3δ²,25-二醇和 9,19-环木菠萝烯-25-烯-3δ²,24-二醇。使用艾氏腹水瘤细胞进行了细胞毒性评估。环木菠萝烯醇对艾氏腹水瘤细胞没有诱导细胞毒性活性,而两种分离出的三萜类化合物都表现出细胞失活作用。9,19-环木菠萝烯-25-烯-3δ²,24-二醇的 IC50 约为 7.5 µM,IC90 约为 13.5 µM。3δ²,25-二醇化合物的活性要低 50%。