Cc1ccc(-c2nc(SCC(=O)N(C)c3c(N)n(Cc4ccccc4)c(=O)[nH]c3=O)n[nH]2)cc1
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?