Figure 2.
HPLC-PDA chromatogram of (1) 5-caffeoylquinic acid; (2) 3-caffeoylquinic acid; (3) 4-caffeoylquinic acid; (4) 1,3-dicaffeoylquinic acid; (5) 3,4-dicaffeoylquinic acid; (6) 3,5-dicaffeoylquinic acid; (7) 4,5-dicaffeoylquinic acid.
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