A method for the synthesis of 5-aryl-1,3,3,-trimethyl-2-methylene-indoline derivatives of Formula or its salts of Formula 1wherein 1 mole of a 5-aryl-2,3,3-trimethyl-3H-indole derivative of Formula is reacted for 1 to 44 hours at a temperature of 20 to 180 C. The booster actuator 10 may include a force input member 28 and a force output member 30 each linearly movable with respect to a body 20 from an initial position to an activated position. A look up function is performed based on the identification code received in the message to retrieve the key from storage.