Cc1ccc(S(=O)(=O)N2CCN(C(=O)CN3C(=O)NC4(CCOc5ccccc54)C3=O)CC2)cc1
The negative base-10 logarithmic of dissociation constant (pka) for an acid is a direct consequence of the underlying thermodynamics of the dissociation reaction; the pKa value is directly proportional to the standard Gibbs free energy change for the reaction. What is the pka value of this molecule?