The present invention relates to dibenzylidene sorbitol -based compounds. In an AND type memory array having an assist electrode, although the memory cell area has been reduced by the field isolation using a MOS transistor, leakage current in the channel direction becomes greater with a reduction in the memory cell size, resulting in problems arising like deterioration of programming characteristics, an increase in the current consumption, and reading failure. The resting support includes a main supporting section for supporting a seated user’s upper torso in a forwards leaning seated position, and at least two supporting legs for supporting the main supporting section and which in use extend downwardly from the main supporting section. The broadcaster distributes the encrypted content information to a subscriber.