A polyurethane resin is synthesized from a compound represented by the following Formula, a polymerizable composition includes the polyurethane resin, a planographic printing plate precursor includes a photosensitive layer including the composition, and a method produces a diol compound that can be used as a raw material of the polyurethane resin. The rear face configurations slowly transition from pure cavity back through cavity-muscle backs to pure muscle backs for increased performance continuum for the set. Each protrusion is associated with one receptacle, and a portion of each protrusion extends into the receptacle. A sealing device covers at least part of the first side opening. The beam spot is then aligned with the waveguide portion using the first alignment set point and the second alignment set point. The power assembly powers the transmitter and sensor assembly.