6F8V:
reference: Molecular Bases of PDE4D Inhibition by Memory-Enhancing GEBR Library Compounds., Prosdocimi T, Mollica L, Donini S, Semrau MS, Lucarelli AP, Aiolfi E, Cavalli A, Storici P, Alfei S, Brullo C, Bruno O, Parisini E, Biochemistry. 2018 May 15;57(19):2876-2888. doi: 10.1021/acs.biochem.8b00288., Epub 2018 May 1. PMID: 29652483

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