Provided herein is technology relating to deuterated amiexanox and particularly, but not exclusively, to compositions comprising deuterated amiexanox, methods of producing deuterated amiexanox, and uses of deuterated amiexanox. A nose cone is connected to the distal inner sheath end. These light emitters may be Light Emitting Diodes andor lasers. The liquid crystal panel is disposed at a side of the backlight module.