Methods of synthesizing pure enantiomers of acylanalides such as Casodex and its derivatives utilizing a compound having a ring structure that, when opened, provides a substituent having the structure of Formula I: . The method comprises the activation of a circuit in response to an external stimuli to a switch. The sensing amplifier includes a current source, a voltage generator, an auxiliary transistor, and an operational amplifier. The system enters hibernation or another state. The parking brake mechanism also includes a parking brake lever pivotally supported by one brake shoe, wherein a shoe operating force is inputted into the input lever by swing of the parking brake lever, and the brake shoes are expanded via the shoe drive mechanism.