The invention relates to a novel compound of formula I or pharmaceutically acceptable salts thereof as well as pharmaceutical, nutraceutical, and botanical drug compositions and therapeutic methods related thereto. A preset mechanism is provided for converting the television signal to the image data. In another embodiment, a key generating device is operable to generate a first and second Diffie-Hellman key from a plurality of large numbers randomly selected, wherein at least one of the numbers is a prime number, and further determine a public key as a Diffie-Hellman transpose of one of the generated first and second Diffie-Hellman keys. for greater than or equal to about 2 hours, and including at least one first siloxane compound having a silicon-bonded hydrogen and at least one second siloxane compound having a silicon-bonded alkenyl group, an encapsulant obtained by curing the composition, and an electronic device including the encapsulant.