galactose, alpha-d-galactopyranose, milk sugar molecule. cyclic form. structural chemical formula on the dark blue background

aging alpha atom atomic blue carb carbon chemical chemistry composition compound cyclic dairy dark flat form formula fructopyranose galactose galactosemia galactosemic glucose hydrogen icon lactose milk molecular molecule monosaccharide oxygen pyranose saccharide schematic science senescence skeletal structural structure sugar sweet sweetness white