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Heronapyrrole B is a farnesylated 2-nitropyrrole bacterial metabolite that has been found inStreptomycesand has antibacterial activity.1,2It is active against the Gram-positive bacteriaS. aureusandB. subtilis(MICs = 1.8 and 7.5 μM, respectively) but not Gram-negativeP. aeruginosaorE. coli.1