galactose, alpha-d- galactofuranose, beta-d- galactofuranose, milk sugar molecule. cyclic form. sheet of paper in a cage

aging alpha atom atomic beta cage carb carbon chemical chemistry composition compound cyclic dairy flat form formula furanose galactofuranose galactose galactosemia galactosemic glucose hydrogen icon lactose milk molecular molecule monosaccharide notebook oxygen pyranose saccharide schematic science senescence sheet skeletal structural structure sugar sweet sweetness