Cc1ccc(-c2nnn(CC(=O)Nc3ccccc3-c3ccccc3)n2)c(-n2cnnn2)c1
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?