6LZH:
reference: Molecular Basis for the Biosynthesis of an Unusual Chain-Fused Polyketide, Gregatin A., Wang WG, Wang H, Du LQ, Li M, Chen L, Yu J, Cheng GG, Zhan MT, Hu QF, Zhang L, Yao M, Matsuda Y, J Am Chem Soc. 2020 May 6;142(18):8464-8472. doi: 10.1021/jacs.0c02337. Epub 2020, Apr 22. PMID: 32275405

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