Two new colored metabolites of Streptomyces murayamaensis have been is
olated and characterized as 4-hydroxy-3-nitrosobenzamide and its ferro
us chelate. These structures have been confirmed by synthesis via a mo
dified Baudisch reaction. A sample of 3-amino-4-hydroxy[2-H-2]benzoic
acid was fed to S. murayamaensis, affording a sample of the 4-hydroxy-
3-nitrosobenzamide ferrous chelate deuterated at C-2 (28.5% enrichment
, 3.2% incorporation).