5E80:
reference: Identification of pyrazolopyridazinones as PDEdelta inhibitors., Papke B, Murarka S, Vogel HA, Martin-Gago P, Kovacevic M, Truxius DC, Fansa EK, Ismail S, Zimmermann G, Heinelt K, Schultz-Fademrecht C, Al Saabi A, Baumann M, Nussbaumer P, Wittinghofer A, Waldmann H, Bastiaens PI, Nat Commun. 2016 Apr 20;7:11360. doi: 10.1038/ncomms11360. PMID: 27094677

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