CC(C)Cc1nnc(NC(=O)CCC(=O)Nc2ccc3c[nH]nc3c2)s1
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?