tautomeric forms of d-galactose, milk sugar. alpha-d- galactofuranose, beta-d- galactofuranose, alpha-d- galactopyranose, beta-d-

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