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. 2021 Nov 4;21:275. doi: 10.1186/s12906-021-03442-8

Fig. 1.

Fig. 1

HPLC of arecoline and Arecae pericarpium (A. pericarpium) extracts. The chromatograms reveal (A) the repeatability and reproducibility of the arecoline standard, and (B) arecoline in separations of A. pericarpium extracts 1–4 (D1, D2, D3, and DM represent extracts 1, 2, 3, and 4, respectively)