Figure 6From: Identification of plant-derived natural products as potential inhibitors of the Mycobacterium tuberculosis proteasome Six natural products of the flavonoids with little inhibitory activity on the Mtb proteasome. Inhibitory activities of six flavonoids (at 200 μM) were zero. Compared with Figure 5, these compounds are without the hydroxyl at the C ring C-3 and the hydroxyl or methoxyl at the A ring C-6.Back to article page