The invention relates to new benzofuran derivatives and their use as active ingredients in the preparation of pharmaceutical compositions. When the system power supply is powered on, the second switch unit is turned on, the ignition coil is powered on. The receiver conditioning block is positioned downstream from the distribution substation, and arranged to provide an analog signal that is responsive to the power signal from the distribution line. A corresponding plurality of elastic ring shaped ribs may extend from the web diaphragm opposite the recesses. Once received, the content decryption component performs integrity authentication of a run-time image of the secure content driver.