Elaidamide is a fatty acid amide that has been found in the cerebrospinal fluid of sleep-deprived cats.1 It inhibits rat microsomal epoxide hydrolase (mEH; Ki = 70 nM).2 Elaidamide also inhibits porcine pancreatic and human synovial phospholipase A2 (PLA2).3 In vivo, elaidamide (10 mg/animal) induces physiological sleep in rats.1

References
1. Cravatt, B.F., Prospero-Garcia, O., Siuzdak, G., et al. Chemical characterization of a family of brain lipids that induce sleep. Science 268(5216), 1506-1509 (1995).
2. Morisseau, C., Newman, J.W., Dowdy, D.L., et al. Inhibition of microsomal epoxide hydrolases by ureas, amides, and amines. Chem. Res. Toxicol. 14(4), 409-415 (2001).
3. Jain, M.K., Ghomashchi, F., Yu, B.Z., et al. Fatty acid amides: scooting mode-based discovery of tight-binding competitive inhibitors of secreted phospholipases A2. J. Med. Chem. 35(19), 3584-3586 (1992).