The present invention provides a novel compound having few side effects such as bradycardia and the like and having superior peripheral blood lymphocyte-decreasing effect. These systems may be used to, for example, produce useful quantities of electric or mechanical energy, heat or cool an external substance or propel an object in a controllable direction. One of the kinds of fibers in each group is shaped so as to appear like a blade of grass. The windings are incidentally, essentially electrically isolated to each other.