Catechinic Acid, also known as catechin gallate, is a naturally occurring compound found in various plants, particularly in tea leaves. However, there are several synonyms used to refer to this same compound. One of the common synonyms is catechol gallate, which is derived from the presence of catechol groups in its chemical structure. Another synonym is gallate of catechin, highlighting the connection between catechin and gallic acid. Moreover, it is also referred to as gallic acid catechin ester, emphasizing the ester linkage between gallic acid and catechin. These synonyms are widely used in scientific literature and research to describe the same compound, further enhancing our understanding of its properties and potential applications.