CCN1C(=O)C(CC(=O)Nc2ccc(OC)cc2)N(CCCN2CCN(c3ccc(F)cc3)CC2)C1=S
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 negative pKa value is directly proportional to the standard Gibbs free energy change for the reaction. What is the negative pKa value of this molecule?