Here, we present a well-defined structure–activityrelationshipstudy, which rationalizes the unique features of the SirReals and probes the limits of modifications on this scaffold regarding inhibitor potency. Moreover, we present a crystal structure of hSirt2 in complex with an optimized SirReal derivative that exhibits an improved in vitro activity. Lastly, we show cellular hyperacetylation of the
develop natural product-based anticancer agents, a series of novel piperazine-linked bergenin heterocyclic hybrids bearing arylthiazolyl (5a–e), benzothiazolyl (10a–i), and arylsulfonyl (13a–o) were synthesized using the classical Mannich reaction and evaluated for their anticanceractivity. All the synthesized derivatives were assessed for in vitro cytotoxic activity against a panel of human cancer