5BUE:
reference: Ligand efficient tetrahydro-pyrazolopyridines as inhibitors of ERK2 kinase., Bagdanoff JT, Jain R, Han W, Poon D, Lee PS, Bellamacina C, Lindvall M, Bioorg Med Chem Lett. 2015 Jun 25. pii: S0960-894X(15)00656-3. doi:, 10.1016/j.bmcl.2015.06.063. PMID: 26144345

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