Cc1ccc(CN2CC(C(=O)N(CC(C)C)c3c(N)n(Cc4ccccc4)c(=O)[nH]c3=O)CC2=O)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?