a-D-Galactose-1,2-13C2 1-phosphate potassium is the 13C- and 15N-labeled a-D-Galactose (HY-121370). alpha-D-Galactose is a non-starch polysaccharide found in the bulb tissues of Lilium davidii var. unicolor Salisb. alpha-D-Galactose has anti-oxidation properties, anti-tumour activities, immunomodulatory effects and anti-HIV functions[1].