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(A) Chromatograms of the extracts after 1 up to 4 days. Insets: expansion of peaks between 7.0 and 8.5 min and between 15.7 and 16.7 min (rescaled for better visualization). (B) Total area under the main peaks in the chromatograms (7.0–8.5 min and 15.7–16.7 min), corresponding to the global concentration of fluorescent species in the extracts.
