CC(C)c1cccc(C(C)C)c1NC(=O)CN1C(=O)NC2(CCCCCCC2)C1=O
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?