CN(CCc1ccccc1)C(=O)c1cccc(NC(=O)Cc2cccc(NC(=O)C3CCCN(C(=O)C4CCCCC4)C3)c2)c1
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?