Halogenated Fatty Acid Amides and Cyclic Depsipeptides from an Eastern Caribbean Collection of the Cyanobacterium <i>Lyngbya majuscula</i>
作者:Jorge I. Jiménez、Tifanie Vansach、Wesley Y. Yoshida、Bryan Sakamoto、Peter Pörzgen、F. David Horgen
DOI:10.1021/np900173d
日期:2009.9.25
extract of an eastern Caribbean collection of Lyngbya majuscula yielded two new halogenated fatty acid amides, grenadamides B (1) and C (2), and two new depsipeptides, itralamides A (3) and B (4), along with the known compounds hectochlorin and deacetylhectochlorin. The recently reported depsipeptide carriebowmide (5) was also present in the extract and isolated as its sulfone artifact (6). Compounds 1−4
东加勒比收集的Lyngbya majuscula的亲脂性提取物产生了两种新的卤代脂肪酸酰胺,手榴弹胺 B ( 1 ) 和 C ( 2 ),以及两种新的缩肽,依曲酰胺 A ( 3 ) 和 B ( 4 ),以及已知的化合物八氯环素和脱乙酰八氯环素。最近报道的缩酚肽 carriebowmide ( 5 ) 也存在于提取物中,并作为其砜类人工制品被分离 ( 6 )。化合物1 - 4通过光谱方法鉴定。3 , 4 , 6氨基酸残基的构型通过酸水解产物的非对映异构衍生物的 LC-MS 分析(高级 Marfey 方法)确定。基于6的构型分析,与真正的carriebowmide ( 5 )直接比较,提出了对5的微小结构修正。化合物1和2对甜菜夜蛾(Spodoptera exigua)显示出边际活性。化合物1 - 4和6进行了评估在人胚胎肾(HEK293)细胞一般小区毒性。只有依曲酰胺 B ( 4 ) 显示出显着的细胞毒性,IC