CCOc1ccc(N2C(=O)CC(Sc3n[nH]c(-c4ccccc4)n3)C2=O)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?