COC(=O)c1cccc(NC(=O)Nc2cc(C(=O)NCc3cccc(F)c3)ccc2N2CCCC2)c1
An acid's negative base-10 logarithmic dissociation constant (pka) follows directly from its underlying thermodynamics; pKa is directly proportional to its standard Gibbs free energy change. What is the pka value of this molecule?