The invention relates to heterocyclic derivatives, compositions comprising such compounds, and methods of preventing or treating conditions and disorders using such compounds and compositions. The holding groove has an open end at an end of the resin layer, the end of the resin layer being located on the IC chip side in terms of an arrangement direction of the IC chip and the photoelectric conversion element, and at least part of the tip portion of the optical fiber extends along the IC chip. A virtual routing engine receives packets associated with a first packet flow and packets associated with a second packet flow. The invention is applicable to dental prostheses made of composite material.