Matthew Susan, Paul Valerie J, Luesch Hendrik
Department of Medicinal Chemistry, University of Florida, Gainesville, Florida 32610, USA.
Planta Med. 2009 Apr;75(5):528-33. doi: 10.1055/s-0029-1185332. Epub 2009 Feb 12.
Three unusual tiglic acid-containing cyclodepsipeptides, possessing the revised regioisomeric structures for largamides A-C (1-3), have been isolated from the marine cyanobacterium Lyngbya confervoides collected from southeastern Florida. The two-dimensional structures were determined by NMR spectroscopy and the absolute configurations by chiral HPLC analysis of degradation products. Compounds 1-3 are moderate inhibitors of mammalian elastase activity in vitro with IC(50) values ranging from 0.53 to 1.41 microM.
从佛罗里达州东南部采集的海洋蓝藻纤细鞘丝藻(Lyngbya confervoides)中分离出了三种不同寻常的含惕各酸环缩肽,它们具有修正后的大酰胺A - C(1 - 3)区域异构体结构。通过核磁共振光谱确定了二维结构,并通过对降解产物的手性高效液相色谱分析确定了绝对构型。化合物1 - 3在体外是哺乳动物弹性蛋白酶活性的中度抑制剂,IC(50)值范围为0.53至1.41微摩尔。