Ito H., Gonthier M.P., Manach C., Morand C., Mennen L., Remesy C., Scalbert A. (2005) Polyphenol levels in human urine after intake of six different polyphenol-rich beverages. Br J Nutr 94:500-9 PubMed (16197573)

Compound Mean content
4-Caffeoylquinic acid 17.3 mg/g dry weight
3-Caffeoylquinic acid 13.6 mg/g dry weight
3,4-Dicaffeoylquinic acid 2.8 mg/g dry weight
3,5-Dicaffeoylquinic acid 1.6 mg/g dry weight
4,5-Dicaffeoylquinic acid 2.9 mg/g dry weight