Cc1ccc(S(=O)(=O)Cn2nnnc2C(c2ccccc2)N2CCN(c3ccccc3)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?