Isolation and structural elucidation of nitrogenous secondary metabolites from terrestrial and marine streptomyces spp

Screening and chromatography of extracts from a terrestrial and a marine-derived streptomycete yielded two new nitrogenous benzene derivatives, namely (S)-N-[3-hydroxy-1-(4-hydroxyphenyl)-propyl]-acetamide (1a), and (R)-2-(1-methyl-2-oxopropylamino)-benzoic acid (2). Additionally, eight known compounds were isolated, 2-acetamidophenol, phenazine-1-carboxylic acid, phenazine-1-carboxylic acid methyl ester, perlolyrin, tyrosol, uracil, and anthranilic acid. The structures of the new compounds were deduced from high resolution mass, 1D and 2D NMR spectra and by comparison with related compounds from the literature. The absolute configuration of 1a and 2 was determined by comparison of experimental and calculated CD and ORD data.