CC12CC(NC(=O)N1c1cccc(C(=O)Nc3nc[nH]n3)c1)c1ccccc1O2
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?