These hydroxycinnamic acids are rarely free. They are usually found in the form of derivatives, e.g., caffeic acid is esterified with quinic acid, resulting in chlorogenic acid, isochlorogenic acid and neochlorogenic acid.
These hydroxycinnamic acids are rarely free. They are usually found in the form of derivatives, e.g., caffeic acid isesterified with quinic acid, resulting in chlorogenic acid, isochlorogenic acid and neochlorogenic acid.