作者:Satoshi Yamauchi、Saya Kawahara、Tuti Wukirsari、Hisashi Nishiwaki、Kosuke Nishi、Takuya Sugahara、Koichi Akiyama、Taro Kishida
DOI:10.1016/j.bmcl.2013.06.067
日期:2013.9
The cytotoxic activities of sesquilignans, (7S,8S,7'R,8'R)- and (7R,8R,7'S,8'S)-morinol A and (7S,8S,7'S,8'S)- and (7R,8R,7'R,8'R)-morinol B were compared, showing no significant difference between stereoisomers (IC50=24-35 mu M). As a next stage, the effect of substituents at 7, 7', and 7 ''-aromatic ring on the activity was evaluated to find out the higher activity of (7S,8S,7'R,8'R)-7,7',7 ''-phenyl derivative 18 (IC50 = 6-7 mu M). In the research on the structure-activity relationship of 7 ''-position of (7S,8S,7'R,8'R)-7,7',7 ''-phenyl derivative 18, the most potent compounds were 7,7',7 ''-phenyl derivative 18 (IC50 = 6 mu M) against HeLa cells. Against HL-60 cells, 7 ''-(4-nitrophenyl)-7,7'-phenyl derivative 33 and 7 ''-hexyl-7,7'-phenyl derivative 37 (IC50=5 mu M) showed highest activity. We discovered the compounds showed four to sevenfold potent activity than that of natural (7S,8S,7'R,8'R)-morinol A. It was also confirmed that the 7'-benzylic hydroxy group have an important role for exhibiting activity, on the other hand, the resonance system of cinnamyl structure is not crucial for the potent activity. (C) 2013 Elsevier Ltd. All rights reserved.