an 18-carbon saturated fatty acid that is structurally similar to the phospholipid-derived N-acyl ethanolamines; inhibits heat-induced firing of nociceptive neurons in rat dorsal horn; induces transient calcium influx in native dorsal root ganglion (DRG) cells and in the PTX-sensitive, DRG-like cell line F-11 (EC50 = 5.5 μM)