CC(C)CC(C(=O)O)N1C(=O)C2C3CC(C2C1=O)C1C(c2ccccc2)c2sc(O)nc2SC31
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?