- There is a central hydroxamic acid (-C(=O)-N(OH)-) functionality.
- The "acyl" side of this hydroxamic acid is a biphenyl system in which the first ring is connected para to the second ring, and the second ring bears a primary amide (-CONH2) substituent at the para position.
- The hydroxamic acid nitrogen is substituted by a two-carbon chain that terminates in a five-membered saturated ring (pyrrolidine). In this ring, the nitrogen is methyl-substituted, and the ring attaches to the two-carbon chain through the carbon adjacent to the nitrogen.
