在甘蔗中以有色化合物或色素前身存在的多酚物质，通过酶和化学作用形成的酚类色素是糖汁色值加深的主要因素之一。
The phenolic compounds of sugarcane exist as the colored compound or pigment predecessor . Phenols colorant is one of the main factors that deepen the color value in juice which are formed by enzymatic and chemical reaction .
前身物质