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. 2018 Aug 28;23(9):2171. doi: 10.3390/molecules23092171

Figure 2.

Figure 2

HPLC-PDA chromatogram of biotransformation reaction mixtures compared with respective standards. S refers to the substrate peak and P refers to the product. (A) 2-amino-3-hydroxyanthraquinone, (B) alizarin, and (C) anthraflavic acid.