Figure 1.

HPLC chromatogram of Opuntia engelmannii cv. Valencia peels phenolic and betalainic profile recorded at 280 nm Ph1–Ph4 phenolic acids (A), 370 nm Fv1-Fv8 Flavonoids (B), and 535 nm Bc1-Bc7 Betalains (C). Peak numbers correspond to the compounds described in Table 1.