Abstract

Dietziamides A and B, two novel tetramic acid dimers, were isolated from the rare actinomycetes Dietzia timorensis MZ-3 in the course of our HPLC-diode array screening of our collection of terrestrial actinomycetes. The spectroscopic analysis revealed the chemical structures of the first secondary metabolites characterized in the genus Dietzia. Dietziamides A and B showed moderate DPPH (1,1-diphenyl-2-picrylhydrazyl) radical scavenging activities.

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