COc1cc(CN2CCC(C(=O)N3CCN(c4ccccc4F)CC3)CC2)ccc1O.O=C(O)C(=O)O
An acid's negative base-10 logarithmic dissociation constant (pKa) follows directly from its underlying thermodynamics; the negative pKa is directly proportional to its standard Gibbs free energy change. What is the negative pKa value of this molecule?