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. 2021 Nov 30;26(23):7278. doi: 10.3390/molecules26237278

Figure 1.

Figure 1

PCA score plot (a) and heat map (b) of the metabolites in oolong teas stored for 1 y, 3 y, 7 y, 14 y, and 25 y. Red represents high contents, while green represents low contents (ranges from −3.0 to 3.0).