Circumdatin H is an alkaloid. It was isolated, along with related compounds, from the fungus Aspergillus ochraceus.
Circumdatin C, and circumdatin F are prototypical members, while other members such as circumdatin D, circumdatin E and circumdatin H have an additional tetrahydropyrrole ring.
The compounds of this group are considered to be useful chemotaxonomic markers. Among these circumdatin H and circumdatin E are able to inhibit the mitochondrial respiratory chain in submitochondrial particles from beef heart, presumable by interfering with NADH oxidase activity (IC<sub>50</sub> 1.5 üM and 2.5 üM, respectively).
First total synthesis of circumdatin H was reported starting from anthranilic acid.