四碳糖 Traditional form: 四碳糖 Pinyin (reading): sìtàntáng Definitions: tetrose (CH2O)4, monosaccharide with four carbon atoms Characters: 四 - four 碳 - carbon 糖 - candy, sugar, sweets Traditional characters: 四 - four 碳 - carbon 糖 - candy, sugar, sweets