Cc1ccc(CN2C(=O)NC(=O)C3(Cc4c(nc5ccccn5c4=O)N4CCCCCC43)C2=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?