6X3Y:
reference: Evaluation of Free Energy Calculations for the Prioritization of Macrocycle Synthesis., Paulsen JL, Yu HS, Sindhikara D, Wang L, Appleby TC, Villasenor AG, Schmitz U, Shivakumar D, J Chem Inf Model. 2020 Jun 15. doi: 10.1021/acs.jcim.0c00132. PMID: 32539379

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