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A basic compound with empirical formula C12H16N2O5 was isolated from Bacillus cereus 102804 fermentations of a soybean meal-glucose medium. The inhibitory activity of compound 102804 on growth of Gram-positive and Gram-negative bacteria growing in a chemically defined medium was reversed by vitamin B12, by L-methionine, and by D-methionine. It has no inhibitory activity for Escherichia coli (Davis 113-3) when grown in media containing L-methionine. The biosynthesis of 102804 coincides with the sporulation of the B. cereus, and the compound is not produced in the absence of sporulation.

Microbial production of vitamin B12 antimetabolites. III. Compound 102804 from Bacillus cereus.