COCCCn1cc(C(=O)c2ccccc2OCC(=O)Nc2cccc(F)c2)cc(C#N)c1=O
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?