CCOC(=O)c1c(NC(=O)C(C)Sc2cn(CCNC(=O)c3ccc(OC)cc3)c3ccccc23)sc2c1CCC2
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?