Cc1ccnc(NC(=O)CCC(=O)N(CC(=O)NC2CCCCC2)Cc2ccccc2)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?