Chemical Properties
Structurally, chlorogenic acid is the ester formed between caffeic acid and -quinic acid.
Isomers of chlorogenic acid include 4-O-caffeoylquinic acid (cryptochlorogenic acid or 4-CQA), 5-O-caffeoylquinic acid (neochlorogenic acid or 5-CQA). The epimer at position 1 has not yet been reported.
Isomer containing two caffeic acid molecules are called isochlorogenic acid. There are several isomers such as 3,4-dicaffeoylquinic acid and 3,5-dicaffeoylquinic acid.
Read more about this topic: Chlorogenic Acid
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