5Z4F:
reference: Enzymology of Anthraquinone-gamma-Pyrone Ring Formation in Complex Aromatic Polyketide Biosynthesis., Hou XF, Song YJ, Zhang M, Lan W, Meng S, Wang C, Pan HX, Cao C, Tang GL, Angew Chem Int Ed Engl. 2018 Oct 8;57(41):13475-13479. doi:, 10.1002/anie.201806729. Epub 2018 Sep 19. PMID: 30151879

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