Cc1ccc(O)c(-c2n[nH]c3c2C(c2ccccc2F)N(Cc2ccco2)C3=O)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?