Surugapyrroles A and B, Two New<i>N</i>-Hydroxypyrroles, as DPPH Radical-Scavengers from<i>Streptomyces</i>sp. USF-6280 Strain
作者:Yasumasa SUGIYAMA、Kei WATANABE、Akira HIROTA
DOI:10.1271/bbb.80617
日期:2009.1.23
Two new N-hydroxypyrroles, surugapyrroles A and B, were isolated as DPPH radical-scavengers from a culture broth of Streptomyces sp. USF-6280 strain. The structures of the two compounds were elucidated by spectroscopic evidences and derivatization. Their DPPH (2,2-diphenyl-1-picrylhydrazyl) radical-scavenging activity was as high as that of butylhydroxytoluene (BHT): surugapyrrole A, ED50 50.3 μm; surugapyrrole B, ED50 75.8 μm.
从链霉菌 USF-6280 菌株的培养液中分离出两种新的 N-羟基吡咯类化合物--超吡咯 A 和 B--作为 DPPH 自由基清除剂。这两种化合物的结构是通过光谱证据和衍生化来阐明的。它们的 DPPH(2,2-二苯基-1-苦基肼)自由基清除活性与丁基羟基甲苯(BHT)不相上下:Surugapyrrole A 的 ED50 为 50.3 μm;Surugapyrrole B 的 ED50 为 75.8 μm。