The present disclosure relates to compounds of formula using the compoundswherein Ring A and the variables X, Y, R3a, R3b, R3c, R3d, R4, R5, R5\u2032, and m are defined herein, to pharmaceutical compositions comprising the compounds, and methods of using the compounds. The image forming apparatus has a photosensitive unit on which an electrostatic latent image is formed, a developer feed unit to feed a developer onto the electrostatic latent image to form a visible image, and a transfer unit. The system includes a processor, a speech database of audio files, and modules for implementing the method. The compiler, in compiling the first program, translates a first function of the first program into a second function of a second program. Further, the slidable base can incline to the base at a position in which the optical fiber connectors are apart each other. Since the steering system is kept under constant pressure, the wheels can only be steered by the steering unit and not by tractive soil forces so toe in and toe out problems are eliminated without need for a mechanical tie rod connecting the steered wheels.