Quorum sensing is a regulatory system used by bacteria for controlling gene expression in response to increasing cell density. This regulatory process manifests itself with a variety of phenotypes including biofilm formation and virulence factor production. Coordinated gene expression is achieved by the production, release, and detection of small diffusible signal molecules called autoinducers. The N-acylated homoserine lactones (AHLs) comprise one such class of autoinducers, each of which generally consists of a fatty acid coupled with homoserine lactone (HSL). Regulation of bacterial quorum sensing signaling systems to inhibit pathogenesis represents a new approach to antimicrobial therapy in the treatment of infectious diseases. AHLs vary in acyl group length (C4-C18), in the substitution of C3 (hydrogen, hydroxyl, or oxo group), and in the presence or absence of one or more carbon-carbon double bonds in the fatty acid chain. These differences confer signal specificity through the affinity of transcriptional regulators of the LuxR family. 3-oxo-C14:1-δ7cis-(L)-HSL is a bacterial quorum sensing compound that possesses antimicrobial activity, the ability to inhibit biofilm formation, and exhibits immune suppressive activity. This compound is structurally related to other 3-oxo-monounsaturated (N-acylated homoserine lactones) AHLs such as 3-oxo-C16:1-δ11cis-(L)-HSL (Catalog No. 10011238).