A compound of formula:wherein Ar1, Ar2, V, X, R3, R4, and m are as disclosed herein or a pharmaceutically acceptable salt thereof alkenyl Compound\u201d); compositions comprising an effective amount of a Cycloalkenyl Compound; and methods for treating or preventing, e. The device has an end having slots therethrough through which one or more of the ends of the string of lights are placed. The enterprise information system contains data corresponding to each such identification code. The elongate base conductor may have a second L-shaped slot with a proximal end opening outwardly at the first side of the elongate base conductor adjacent the medial portion thereof and having a distal end adjacent the second end of the elongate base conductor. An input light directing device directs the light source and the converging lens as a unit to focus the input light on a desired location. The refractive surface includes a continuous curved surface of a single curvature radius formed on both sides of the single curvature lens.