Photocosmetic device for use in medical or non-medical environments, which can be used for a variety of tissue treatments. The sequential information can include a number of tokens representing a path. The boat has an electro-mechanical module including a power source, propulsion means, remote control receiver and a plurality of servos operatively connected to allow the speed and direction of the vessel to be controlled remotely. A lead includes a lead body; a plurality of electrodes disposed at the distal end of the lead body; and a plurality of lead wires. Further the sense timing differs in accordance with the position of the selected memory cell in the memory cell array. Compounds having formula are prepared by reacting the corresponding precursor having R2\u2550OH and the suitably protected 1-acetyl-glycose.