Small molecule compounds are provided for treating lupus as are methods of treating lupus using these compounds. The flux amplitude signal is derived from motor flux estimations in combination with a rotor angle estimation. The invention enables brush-support devices to be fixed to the printed circuit card solely by surface mounting, thus making it pointless to perform an additional flow soldering operation as is required in the prior art. The wheel pilot portion including a plurality of separated pilots separated along a circumferential direction. The stabilized solution comprises at least one acid acceptor, at least one radical scavenger, at least one Lewis base and at least one compound possessing a buffering effect. The ply folding portion includes a main portion folded along the bead core, and a winding-up portion extending continuously to the main portion and apart from the bead core.