In a series of searches fot DNA topoisomerase II inhibitors from naturally occurring compounds, a wood extract of Neonauclea calycina MERR. (Rubiaceae) showed a moderate effect in vitro. Purification of the extract resulted in the isolation of seven known anthraquinones. The structures were characterized as damnacanthal, rubiadin 1-methyl ether, nordamnacanthal, morindone, damnacanthol, lucidin 3-O-primeveroside and morindone 6-O-primeveroside by spectral analysis, respectively. Damnacanthal and morindone showed an intensive inhibitory effect against topoisomerase II (IC50 : 20μg/ml and 21μg/ml).
在一系列从天然化合物(Neonauclea calycina MERR 的木材
提取物)中寻找 DNA 拓扑异构酶 II
抑制剂的过程中。 (
茜草科)在体外表现出中等效果。
提取物的纯化导致七种已知的
蒽醌的分离。通过光谱分析,其结构分别为damacanthal、rubiadin 1-methyl ether、nordamnacanthal、morindone、damacanthol、lucidin 3-O-primeveroside和morindone 6-O-primeveroside。 Damnacanthal 和吗啉酮对拓扑异构酶 II 显示出强烈的抑制作用(IC50:20μg/ml 和 21μg/ml)。