4QP7:
reference: Fragment-based discovery of potent ERK2 pyrrolopyrazine inhibitors., Burdick DJ, Wang S, Heise C, Pan B, Drummond J, Yin J, Goeser L, Magnuson S, Blaney J, Moffat J, Wang W, Chen H, Bioorg Med Chem Lett. 2015 Nov 1;25(21):4728-32. doi: 10.1016/j.bmcl.2015.08.048., Epub 2015 Aug 22. PMID: 26338362

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