CC(C)[C@H](NC(=O)[C@H]1N2C(=O)c3ccccc3C2SC1(C)C)C(=O)NCc1ccco1
An acid's negative base-10 logarithmic dissociation constant (pKa) follows directly from its underlying thermodynamics; the negative pKa is directly proportional to its standard Gibbs free energy change. What is the negative pKa value of this molecule?