A novel aryl-hydrazide from the marine lichen Lichina pygmaea: Isolation, synthesis of derivatives, and cytotoxicity assays
作者:Catherine Roullier、Marylène Chollet-Krugler、Pierre van de Weghe、Françoise Lohézic-Le Devehat、Joël Boustie
DOI:10.1016/j.bmcl.2010.06.013
日期:2010.8
A new aryl-hydrazide L-glutamic acid derivative, pygmeine (3), was isolated from a methanolic extract of Lichina pygmaea, a marine lichen. Synthetic derivatives obtained via a two-step coupling of L-glutamic acid with phenylhydrazine moieties were useful to elucidate the structure of 3 and to carry out biological assays. Thus, the cytotoxicity of the ortho-, meta-, and para-hydroxyl isomers along with their respective benzyl intermediates, and a natural methoxylated analog, were evaluated on murine and human melanoma cells (B16, A375). The para-hydroxyl isomer 6 was found to be the most active (IC50 = 1.6 mu M) on B16 cells. (C) 2010 Elsevier Ltd. All rights reserved.