Ammonificins A and B, Hydroxyethylamine Chroman Derivatives from a Cultured Marine Hydrothermal Vent Bacterium, Thermovibrio ammonificans

Two hydroxyethylamine chroman derivatives, ammonificins A (1) and B (2), were isolated from the marine hydrothermal vent bacterium Thermovibrio ammonificans. The molecular structures of these compounds were determined using a combination of NMR, mass spectrometry, and CD analyses. Biological activities were determined using an antimicrobial assay and the patented ApopScreen cell-based screen for apoptosis induction and potential anticancer activity. To our knowledge, this is the first report of secondary metabolites from the marine hydrothermal vent bacterium T. ammonificans.