Cc1ccc(-n2nnc(-c3nsc(NC(=O)c4ccc(C)c(C)c4)n3)c2C)cc1
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?