6ETO:
reference: The Alkylquinolone Repertoire of Pseudomonas aeruginosa is Linked to Structural Flexibility of the FabH-like 2-Heptyl-3-hydroxy-4(1H)-quinolone (PQS) Biosynthesis Enzyme PqsBC., Witzgall F, Depke T, Hoffmann M, Empting M, Bronstrup M, Muller R, Blankenfeldt W, Chembiochem. 2018 May 3. doi: 10.1002/cbic.201800153. PMID: 29722462

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