CCOc1ccc(CNCc2c(C(=O)O)n(Cc3ccc(C)cc3)c3cc(C)ccc23)cc1
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?